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1.
Nature ; 608(7923): 603-608, 2022 08.
Artículo en Inglés | MEDLINE | ID: mdl-35790190

RESUMEN

SARS-CoV-2 Omicron subvariants BA.2.12.1 and BA.4/5 have surged notably to become dominant in the United States and South Africa, respectively1,2. These new subvariants carrying further mutations in their spike proteins raise concerns that they may further evade neutralizing antibodies, thereby further compromising the efficacy of COVID-19 vaccines and therapeutic monoclonals. We now report findings from a systematic antigenic analysis of these surging Omicron subvariants. BA.2.12.1 is only modestly (1.8-fold) more resistant to sera from vaccinated and boosted individuals than BA.2. However, BA.4/5 is substantially (4.2-fold) more resistant and thus more likely to lead to vaccine breakthrough infections. Mutation at spike residue L452 found in both BA.2.12.1 and BA.4/5 facilitates escape from some antibodies directed to the so-called class 2 and 3 regions of the receptor-binding domain3. The F486V mutation found in BA.4/5 facilitates escape from certain class 1 and 2 antibodies but compromises the spike affinity for the viral receptor. The R493Q reversion mutation, however, restores receptor affinity and consequently the fitness of BA.4/5. Among therapeutic antibodies authorized for clinical use, only bebtelovimab retains full potency against both BA.2.12.1 and BA.4/5. The Omicron lineage of SARS-CoV-2 continues to evolve, successively yielding subvariants that are not only more transmissible but also more evasive to antibodies.


Asunto(s)
Anticuerpos Antivirales , Deriva y Cambio Antigénico , COVID-19 , Mutación , SARS-CoV-2 , Anticuerpos Neutralizantes/inmunología , Anticuerpos Neutralizantes/uso terapéutico , Anticuerpos Antivirales/inmunología , Anticuerpos Antivirales/uso terapéutico , Deriva y Cambio Antigénico/genética , Deriva y Cambio Antigénico/inmunología , COVID-19/inmunología , COVID-19/virología , Vacunas contra la COVID-19/inmunología , Humanos , Inmunización Secundaria , Receptores Virales/metabolismo , SARS-CoV-2/clasificación , SARS-CoV-2/genética , SARS-CoV-2/inmunología , Glicoproteína de la Espiga del Coronavirus/genética , Glicoproteína de la Espiga del Coronavirus/inmunología , Glicoproteína de la Espiga del Coronavirus/metabolismo
2.
AIDS Behav ; 2024 May 27.
Artículo en Inglés | MEDLINE | ID: mdl-38801501

RESUMEN

With the rise of new and emerging Pre-Exposure Prophylaxis (PrEP) modalities, greater attention is needed to better understand how people who could benefit from PrEP make decisions to initiate, stop, pause, or switch PrEP regimens. In this study we borrow from the field of consumer research to create a consumer-derived PrEP Consumer Journey Model that describes key decision-making touchpoints a PrEP consumer moves through within and outside of a clinical context. Using in-depth interviews (n = 29) with gay and bisexual men who have sex with men, we evaluate which system 1 (emotional) and system 2 (cognitive) attributes are used for decision-making at different touchpoints along the PrEP Consumer Journey. Our results suggest system 1 attributes, such as feeling protected, reducing anxiety, enhancing pleasure, social norms, and taking ownership over health were more salient when consumers moved from pre-contemplation to information gathering, as well as evaluating post-uptake experience. System 2 attributes, including cost, side effects, dosing schedule, and sexual frequency, were present throughout the PrEP Consumer Journey, but particularly influential in the information gathering stage and when pausing, switching, or opting out of PrEP. We contend the PrEP Consumer Journey, and our findings related to decision-making, can help orient medical providers to anticipated patient concerns around PrEP use and ultimately provide more supportive and engaging PrEP counseling and services.

3.
AIDS Behav ; 27(3): 823-831, 2023 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-36044125

RESUMEN

With the recent endorsement of PrEP by the Chinese government, research is urgently needed to better understand factors impacting PrEP uptake among gay, bisexual, and other men who have sex with men (GBMSM) in China. This study examined willingness to use PrEP for HIV prevention among GBMSM in China through structural equation modeling. We examined the relationship among PrEP-related attitudes, subjective norms, PrEP-related knowledge and beliefs about medicines and willingness to use PrEP. The analysis showed a good fit between the data and both the measurement model (RMSEA = 0.060) and structural model (RMSEA = 0.054). Knowledge, attitudes, and subjective norms were significantly related to intention to use PrEP, whereas the effect of general beliefs about medicines was insignificant. These effect mechanisms point to the importance of designing interventions to support PrEP uptake that target knowledge, enhance positive attitudes about PrEP within social networks, and build positive social norms around PrEP among sexually active GBMSM.


Asunto(s)
Infecciones por VIH , Profilaxis Pre-Exposición , Minorías Sexuales y de Género , Masculino , Humanos , Homosexualidad Masculina , Análisis de Clases Latentes , Infecciones por VIH/prevención & control , China
4.
AIDS Behav ; 27(1): 4-9, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36056997

RESUMEN

The long-acting feature of cabotegravir, an integrase-inhibitor highly effective in preventing acquisition of HIV in adolescents and adults, is both its greatest strength and a challenge to its implementation. Cab-LA is administered at 8-week intervals (after an initial loading dose) but has a long, variable drug "tail" that may leave users vulnerable to future drug resistance if they contract HIV during this critical period. The potential for cab-LA to meaningfully contribute to ending the HIV Epidemic is hindered by, among other factors, limited resources to guide patients and providers on how to safely discontinue injections. We suggest three key strategies to overcome this specific challenge: (1) Comprehensive patient education and counseling about the drug tail; (2) Training and coaching PrEP care teams, including clinical and non-clinical staff, on communication around the tail; (3) Adherence support strategies, including monitoring of cabotegravir drug levels after discontinuation, for a personalized medicine approach to safe discontinuation.


Asunto(s)
Fármacos Anti-VIH , Infecciones por VIH , Inhibidores de Integrasa VIH , Profilaxis Pre-Exposición , Adulto , Adolescente , Humanos , Fármacos Anti-VIH/uso terapéutico , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/prevención & control
5.
Sex Transm Dis ; 49(10): 713-718, 2022 10 01.
Artículo en Inglés | MEDLINE | ID: mdl-35921642

RESUMEN

BACKGROUND: HIV preexposure prophylaxis (PrEP) remains underutilized despite its efficacy and potential population impact. Achieving PrEP's full potential depends on providers who are knowledgeable and comfortable prescribing it to individuals at risk of acquiring HIV. Previous educational interventions targeting provider-related uptake barriers have had limited success. We designed and tested an electronic medical record (EMR) interpretative comment to improve the delivery of PrEP. METHODS: An EMR comment provided information on PrEP eligibility and referral resources to providers delivering positive chlamydia and gonorrhea results. Positive test results for bacterial sexually transmitted infections before intervention (January 1, 2019-August 23, 2019) and after intervention (August 24, 2019-December 31, 2019) were identified. A retrospective chart review was conducted to ascertain provider documentation of PrEP discussions or provision, HIV prevention discussions, and HIV screening. Pretest-posttest analysis was performed to compare the provision of PrEP and HIV prevention services. RESULTS: We reviewed 856 preintervention encounters spanning 8 months and 461 postencounters spanning 4 months. Patient demographics were comparable. We observed an increase in provider documentation of safe sex and condom counseling (odds ratios [ORs], 1.2 [95% confidence interval {CI}, 1.07-1.18] and 1.11 [95% CI, 1.05-1.17], respectively), and the absence of any HIV prevention discussion decreased (OR, 0.85; 95% CI, 0.80-0.90), but not HIV screening or PrEP documentation. CONCLUSIONS: We demonstrated that an EMR laboratory comment had a modest effect on increasing risk reduction counseling, although not HIV screening or PrEP prescriptions. Future strategies to encourage provider delivery of sexual health services may benefit from more targeted strategies that combine behavioral and information technology approaches.


Asunto(s)
Fármacos Anti-VIH , Infecciones por VIH , Profilaxis Pre-Exposición , Centros Médicos Académicos , Consejo , Registros Electrónicos de Salud , Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Humanos , Profilaxis Pre-Exposición/métodos , Estudios Retrospectivos , Sexo Seguro , Consejo Sexual
6.
Cult Health Sex ; 24(6): 797-811, 2022 06.
Artículo en Inglés | MEDLINE | ID: mdl-33600269

RESUMEN

This study examined the social context and lived experience of HIV risk management among sexual minority men in China. An interpretative phenomenological analysis of 25 in-depth interviews with participants in five Chinese cities was undertaken. Findings show how men managed HIV risk in the context of high risk perception and anxiety, and strong perceived social discrimination and marginalisation. Men's choice of risk management strategies was influenced by their often-negative perceptions of gay community, social norms around condom use, and prior lived experience. Results underscore the importance of considering these contexts when planning pre-exposure prophylaxis (PrEP) implementation in China and highlight the need for strategies to address potential PrEP-related stigma among sexual minority men.


Asunto(s)
Infecciones por VIH , Profilaxis Pre-Exposición , Minorías Sexuales y de Género , China , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/prevención & control , Homosexualidad Masculina , Humanos , Masculino , Profilaxis Pre-Exposición/métodos , Gestión de Riesgos , Conducta Sexual
7.
Sex Transm Dis ; 48(10): e149-e152, 2021 10 01.
Artículo en Inglés | MEDLINE | ID: mdl-34110753

RESUMEN

ABSTRACT: Graduate medical training is an opportune time to improve provider delivery of sexually transmitted infection (STI) screening. A survey of trainees found that the majority feel STI screening is their job but identified barriers to successful screening. Training that intentionally address service-specific barriers will be valuable in ending the STI epidemic.


Asunto(s)
Enfermedades de Transmisión Sexual , Conocimientos, Actitudes y Práctica en Salud , Humanos , Tamizaje Masivo , Enfermedades de Transmisión Sexual/diagnóstico , Enfermedades de Transmisión Sexual/epidemiología , Enfermedades de Transmisión Sexual/prevención & control , Encuestas y Cuestionarios
8.
AIDS Behav ; 25(10): 3413-3424, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-33791880

RESUMEN

Training lay health workers is a critical intervention strategy to support HIV pre-exposure prophylaxis (PrEP) implementation. However, few evaluations of such trainings have been published. We conducted multi-time-point surveys to evaluate the effect of a training intervention on knowledge, PrEP stigma, and implementation behavior among lay HIV workers in China. Results indicated high acceptability and appropriateness of the training. PrEP knowledge score increased by 65% from pre- to post-training, and remained high one-month post-training. We observed a significant decrease in PrEP stigma and a positive influence on determinants of implementation behaviors. All lay HIV workers surveyed one-month after the training reported having disseminated PrEP information in social networks; 43% reported integrating PrEP education into routine work. The training is an effective strategy to build lay HIV workers' capacity in PrEP implementation. Longer-term post-training follow up would be ideal to further assess actual PrEP uptake and sustained effects on PrEP implementation.


Asunto(s)
Fármacos Anti-VIH , Infecciones por VIH , Profilaxis Pre-Exposición , Fármacos Anti-VIH/uso terapéutico , Difusión de Innovaciones , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/prevención & control , Humanos , Aceptación de la Atención de Salud , Estigma Social
9.
AIDS Behav ; 25(3): 798-808, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32948921

RESUMEN

To explore the relationships among individual-, social-, and contextual- (state-level characteristics, including LBGTQ + and racial inequality) level factors and PrEP use. A cross-sectional survey was conducted in 2015-2016 among a geographically diverse group of men who have sex with men (MSM). Survey data was linked to publicly available state-level data based on participant zip code. Multivariable multilevel logistic regression was used to explore the association between multilevel variables and PrEP use. Of 4165 HIV-negative MSM, 13.4% were taking PrEP. In the regression analysis, several demographic and behavioral factors were associated with higher odds of PrEP use. Importantly, after adjusting for individual- and social-level factors, residents of states with high LGBTQ + equality had significantly higher odds of taking PrEP (OR 1.57; 95% CI 1.119, 2.023) compared to low equality states. LGBTQ + inequality between states may hinder PrEP use. States may need to take proactive measures to reduce LGBTQ + inequality as this may negatively impact the ability to reach the federal administration's stated goal to end the HIV epidemic in the US.


Asunto(s)
Fármacos Anti-VIH/administración & dosificación , Infecciones por VIH/prevención & control , Accesibilidad a los Servicios de Salud , Homosexualidad Masculina/psicología , Aceptación de la Atención de Salud , Profilaxis Pre-Exposición/métodos , Adolescente , Adulto , Fármacos Anti-VIH/uso terapéutico , Actitud Frente a la Salud , Estudios Transversales , Infecciones por VIH/epidemiología , Homosexualidad Masculina/estadística & datos numéricos , Humanos , Masculino , Persona de Mediana Edad , Análisis Multinivel , Minorías Sexuales y de Género , Estados Unidos/epidemiología , Adulto Joven
10.
Clin Trials ; 18(1): 17-27, 2021 02.
Artículo en Inglés | MEDLINE | ID: mdl-32838558

RESUMEN

BACKGROUND/AIMS: Early integration of behavioral and social sciences research into clinical trials can improve trial conduct and facilitate future implementation of biomedical interventions. We sought to examine participants' experiences in clinical trials with broadly neutralizing antibodies and describe the development of educational materials for use in future broadly neutralizing antibody research. METHODS: We conducted semi-structured interviews with trial participants in phase 1 trials evaluating safety and efficacy of broadly neutralizing antibodies for HIV prevention and treatment and key informants (i.e. trial staff involved in broadly neutralizing antibody research). Semi-structured interviews were transcribed and analyzed thematically. Based on findings from the interviews, we developed educational materials addressing concerns and misconceptions identified among trial participants with input from community and research stakeholders. Educational materials were used in subsequent clinical trials with broadly neutralizing antibodies. We evaluated trial staff's experiences with newly developed educational materials in follow-up key informant interviews. RESULTS: Although most participants were concerned about long-term harms related to the investigational product upon enrollment, absence of severe side effects in the trial led to an underestimation of risks related to the study during trial participation. Participants showed a poor understanding of what broadly neutralizing antibodies are and the differences between broadly neutralizing antibodies and other HIV prevention and treatment products, such as antiretrovirals. Many trial participants overestimated the possible public health impact of the broadly neutralizing antibody trials in which they were enrolled, associating broadly neutralizing antibody research with the development of vaccine or cure for HIV in the near future. Based on these concerns and misconceptions among trial participants, we developed a frequently asked questions document and adapted an existing educational video about broadly neutralizing antibodies. In follow-up interviews, key informants reported that materials helped address trial participants' concerns and questions related to the trial. Key informants reported using the educational materials not only during informed consent but also throughout trial participation, which contributed to making informed consent an "ongoing" process. CONCLUSION: Integration of behavioral research into clinical trials with broadly neutralizing antibodies is key to identify and address key concerns among trial participants. Behavioral and social sciences research promotes communication between trial participants and biomedical researchers, facilitates engagement of participants and trial staff, and strengthens trial conduct. Development of educational materials collaboratively by behavioral and clinical scientists, trial staff, and community stakeholders is feasible and may help to address trial participants' concerns and misconceptions. Future research should evaluate the impact of educational materials in recruitment and retention of trial participants.


Asunto(s)
Anticuerpos ampliamente neutralizantes/uso terapéutico , Ensayos Clínicos como Asunto/normas , Infecciones por VIH , Educación del Paciente como Asunto , Femenino , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/prevención & control , Humanos , Consentimiento Informado , Masculino , Investigadores
11.
AIDS Behav ; 24(6): 1951-1965, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-31858301

RESUMEN

Health workers report challenges to broaching sexual behavior with gay and bisexual men (MSM). We conducted a stigma-mitigation training to increase provider-initiated conversation about anal sexuality among Chinese health workers. The two-day workshop, titled Smarter Sex is the New Safer Sex: Anal Pleasure and Health, coupled information about anal physiology and sexual response with gradual exposure to trainees' emotional and cognitive responses. We analyzed surveys and one-time interviews. Acceptability (satisfaction with training activities and recommended practices), feasibility (compatibility with participants' current practices), and appropriateness (perceived fit with participants' work mission and goals) were high, reaching 84-95% of the scale range, though with variable ratings for trainee comfort during participation. Qualitative data confirm health workers' motivation to discuss anal sexuality and the value of learning about anal physiology and sexual response, but revealed continued uncertainty about how to broach and navigate discussion with clients. Refinement of the training to align with health worker recommendations and to augment communication options and skills is warranted, as is involvement of MSM clientele themselves.


Asunto(s)
Infecciones por VIH , Homosexualidad Masculina , Conducta Sexual , Minorías Sexuales y de Género , Adulto , Estudios de Factibilidad , Femenino , Identidad de Género , Infecciones por VIH/prevención & control , Conocimientos, Actitudes y Práctica en Salud , Humanos , Masculino , Estigma Social
12.
AIDS Care ; 32(12): 1573-1580, 2020 12.
Artículo en Inglés | MEDLINE | ID: mdl-32188267

RESUMEN

Despite abundant evidence on its safety, tolerability and cost-effectiveness, post-exposure prophylaxis (PEP) has not been officially approved for non-occupational use in China. This study aims to assess awareness of, willingness to use, and actual experience with PEP in gay, bisexual and other men who have sex with men (GBM) in China and to explore potential associations between demographic, behavioral, and psychosocial factors and PEP-related outcomes. We recruited a convenience sample through community venue-based strategies, peer referrals, and online advertisement in four cities of China in 2018. We used bivariable and multivariable logistic regression to test associations between potential predictors and PEP outcomes. Over 60% of men reported having heard of PEP prior to the survey, 70% would be willing to use it if exposed to HIV, and 6% reported having used PEP. Awareness of PEP was associated with higher education, more frequent HIV testing, knowing someone who seroconverted in the past two years, having sex with only men in the past six months, and lower perceived risk of HIV infection. PEP willingness was associated with more frequent HIV testing, being worried about becoming HIV infected, prior awareness and favorable attitudes towards PEP among friends. Findings suggest PEP is an underutilized diomedical HIV prevention intervention among GBM in China. Clinical guidance on non-occupational PEP use, as well as communication campaigns targeting social networks of GBM are needed to address barriers to PEP awareness and uptake.


Asunto(s)
Fármacos Anti-VIH/uso terapéutico , Infecciones por VIH/prevención & control , Infecciones por VIH/psicología , Conocimientos, Actitudes y Práctica en Salud , Homosexualidad Masculina/psicología , Profilaxis Posexposición/estadística & datos numéricos , Profilaxis Pre-Exposición , Adulto , China , Homosexualidad Masculina/estadística & datos numéricos , Humanos , Masculino , Persona de Mediana Edad , Asunción de Riesgos , Minorías Sexuales y de Género , Encuestas y Cuestionarios , Adulto Joven
13.
BMC Public Health ; 20(1): 4, 2020 Jan 06.
Artículo en Inglés | MEDLINE | ID: mdl-31906905

RESUMEN

BACKGROUND: In China, addressing disparities in the HIV epidemic among men who have sex with men (MSM) requires targeted efforts to increase their engagement and retention in prevention. In an effort to advance MSM-friendly HIV services within China, and informed by community-based partnerships, we tested whether MSM who have ever versus never disclosed their same-sex behavior to healthcare providers (HCP) differ in sociodemographic and behavioral characteristics as well as the qualities of sexual health services each group would prefer to access. METHODS: We conducted a cross-sectional survey among HIV-negative MSM who went to MSM-focused voluntary counseling and testing clinics in four cities in China. The survey was anonymous and collected information on sociodemographic characteristics, testing behaviors, sexual-health related behavior, and sexual health service model preferences. RESULTS: Of 357 respondents, 68.1% participants had ever disclosed same-sex behavior to HCPs when seeking advice for sexual health. Younger age (aOR = 1.04; 95% CI: 1.01-1.08), and worry of HIV acquisition (aOR = 1.39; 95% CI: 1.05-1.84) were associated with higher odds of past disclosure. The availability of comprehensive sexual health services was one of the most valued characteristics of the ideal sexual health clinic. Those who ever disclosed and never disclosed differed significantly in their ranking of the importance of three out of ten dimensions: sexual health counseling services available (M = 3.99 vs. M = 3.65, p = .002), gay identity support available (M = 3.91 vs. M = 3.62, p = .016) and clinic collaborates with a gay CBO (M = 3.81 vs. M = 3.56, p = .036). CONCLUSIONS: Our hypothesis that MSM who had disclosed versus never disclosed same-sex behavior would differ in the value they placed on different dimensions of sexual health service was partially borne out. As health authorities in China decide on implementation models for pre-exposure prophylaxis (PrEP) delivery and specifically within which institutions to integrate PrEP services, the preferences of target populations should be considered to develop comprehensive, patient-centric and LGBT-friendly services.


Asunto(s)
Revelación/estadística & datos numéricos , Infecciones por VIH/prevención & control , Homosexualidad Masculina/psicología , Prioridad del Paciente/estadística & datos numéricos , Minorías Sexuales y de Género/psicología , Adulto , China , Ciudades , Estudios Transversales , Encuestas de Atención de la Salud , Homosexualidad Masculina/estadística & datos numéricos , Humanos , Masculino , Atención Dirigida al Paciente/organización & administración , Relaciones Médico-Paciente , Minorías Sexuales y de Género/estadística & datos numéricos
14.
Cult Health Sex ; 22(12): 1365-1381, 2020 12.
Artículo en Inglés | MEDLINE | ID: mdl-31702447

RESUMEN

Stakeholder engagement is increasingly recognised and institutionalised as an essential component of HIV-related biomedical research. However, we know little about stakeholder engagement's social outcomes, such as its influence on the community it engages with, in authoritarian regimes and beyond high-income countries. This study evaluates a multi-site structured stakeholder engagement programme conducted in parallel with two HIV prevention studies among men who have sex with men in China. We conducted a one-month ethnographic study and 41 semi-structured interviews with participants of a structured stakeholder engagement programme in six Chinese cities. We found that the structured stakeholder engagement programme offered community stakeholders additional and flexible funding, networking opportunities, increased clinical research literacy, and strengthened their connections with the community. However, the structured stakeholder programme generated unintended consequences in some cases. It caused community stakeholders to expend their social capital, introduced moral conflicts and created tension between stakeholders' 'community representative' and 'research assistant' identities. Our findings suggest that despite these unintended consequences, structured stakeholder engagement could effectively mitigate negative outcomes generated by such engagement if such programmes are more sensitive and responsive to the broader socio-political structure in which trials are embedded.


Asunto(s)
Investigación Biomédica , Participación de la Comunidad/economía , Infecciones por VIH/prevención & control , Homosexualidad Masculina , Participación de los Interesados , Antropología Cultural , China , Humanos , Entrevistas como Asunto , Masculino
15.
AIDS Behav ; 23(10): 2784-2794, 2019 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-31280397

RESUMEN

In a study of sexually-active HIV-negative men who have sex with men (MSM) in China, we compared behavioral indication for pre-exposure prophylaxis (PrEP) based on risk criteria to self-perception of PrEP candidacy (SPC) and explored factors associated with SPC. Of 708 MSM surveyed, 323 (45.6%) were behaviorally-indicated for PrEP, among whom 42.1% self-perceived as appropriate PrEP candidates. In a multivariable model we found no association between sexual behavior nor HIV risk perception and SPC but found that higher perceived benefits of PrEP, increased frequency of HIV testing, and low condom use self-efficacy were positively-associated with SPC. In a sub-analysis restricted to MSM behaviorally-indicated for PrEP, relationship-factors were also significant. Our findings suggest that PrEP implementers should look beyond risk criteria to consider shared decision-making tools that support individuals to assess whether they are appropriate PrEP candidates based on their existing HIV prevention strategies, sexual health goals, and relationship dynamics.


Asunto(s)
Infecciones por VIH/prevención & control , Homosexualidad Masculina/psicología , Aceptación de la Atención de Salud/psicología , Profilaxis Pre-Exposición , Asunción de Riesgos , Autoimagen , Sexo Inseguro/estadística & datos numéricos , Adulto , China , Condones , Conocimientos, Actitudes y Práctica en Salud , Humanos , Masculino , Persona de Mediana Edad , Conducta Sexual/estadística & datos numéricos , Encuestas y Cuestionarios , Adulto Joven
16.
AIDS Behav ; 23(2): 523-533, 2019 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-29971734

RESUMEN

Risk of HIV infection is high in Chinese MSM, with an annual HIV incidence ranging from 3.41 to 13.7/100 person-years. Tenofovir-based PrEP is effective in preventing HIV transmission in MSM. This study evaluates the epidemiological impact and cost-effectiveness of implementing PrEP in Chinese MSM over the next two decades. A compartmental model for HIV was used to forecast the impact of PrEP on number of infections, deaths, and disability-adjusted life years (DALY) averted. We also provide an estimate of the incremental cost-effectiveness ratio (ICER) and the cost per DALY averted of the intervention. Without PrEP, there will be 1.1-3.0 million new infections and 0.7-2.3 million HIV-related deaths in the next two decades. Moderate PrEP coverage (50%) would prevent 0.17-0.32 million new HIV infections. At Truvada's current price in China, daily oral PrEP costs $46,813-52,008 per DALY averted and is not cost-effective; on-demand Truvada reduces ICER to $25,057-27,838 per DALY averted, marginally cost-effective; daily generic tenofovir-based regimens further reduce ICER to $3675-8963, wholly cost-effective. The cost of daily oral Truvada PrEP regimen would need to be reduced by half to achieve cost-effectiveness and realize the public health good of preventing hundreds of thousands of HIV infections among MSM in China.


Asunto(s)
Fármacos Anti-VIH/uso terapéutico , Combinación Emtricitabina y Fumarato de Tenofovir Disoproxil/uso terapéutico , Infecciones por VIH/prevención & control , Profilaxis Pre-Exposición/estadística & datos numéricos , Años de Vida Ajustados por Calidad de Vida , Minorías Sexuales y de Género , China/epidemiología , Análisis Costo-Beneficio , Infecciones por VIH/economía , Infecciones por VIH/epidemiología , Homosexualidad Masculina , Humanos , Incidencia , Masculino , Modelos Económicos , Modelos Estadísticos , Profilaxis Pre-Exposición/economía
17.
BMC Infect Dis ; 19(1): 663, 2019 Jul 25.
Artículo en Inglés | MEDLINE | ID: mdl-31345169

RESUMEN

BACKGROUND: Biomedical interventions such as antiretroviral therapy (ART) and pre-exposure prophylaxis (PrEP) are highly effective for prevention of human immunodeficiency virus (HIV) infection. However, China has not released national PrEP guidelines, and HIV incidence among men who have sex with men (MSM) is unchanged despite substantial scale-up of ART. We evaluated reductions in HIV transmission that may be achieved through early initiation of ART plus partners' PrEP. METHODS: Six intervention scenarios were evaluated in terms of their impact on HIV transmission and their cost-effectiveness for 36 months post-infection. Three scenarios were based on observed data: non-ART, standard-ART, and early-ART. Another three scenarios were based on observed and hypothetical data: non-ART plus partners' PrEP, standard-ART plus partners' PrEP, and early-ART plus partners' PrEP. The number of onward transmissions was calculated according to viral load and self-reported sexual behaviors, and calibrated by the prevalence and incidence of HIV among Chinese MSM. Cost-effectiveness outcomes were quality-adjusted life-years (QALYs) and cost-utility ratio (CUR). RESULTS: The estimated number of onward transmissions by every 100 HIV-positive cases 36 months post-infection was 41.83 (95% credible interval: 30.75-57.69) in the non-ART scenario, 7.95 (5.85-10.95) in the early-ART scenario, and 0.79 (0.58-1.09) in the early-ART plus partners' PrEP scenario. Compared with non-ART, the early-ART and early-ART plus partners' PrEP scenarios were associated with an 81.0 and 98.1% reduction in HIV transmission, and had a CUR of $12,864/QALY and $16,817/QALY, respectively. CONCLUSIONS: Integrated delivery of early ART and sexual partners' PrEP could nearly eliminate HIV transmission and reduce costs during the first 36 months of HIV infection. Our results suggest a feasible and cost-effective strategy for reversing the HIV epidemic among MSM in China.


Asunto(s)
Antirretrovirales/uso terapéutico , Infecciones por VIH/prevención & control , Profilaxis Pre-Exposición/economía , Adulto , Anciano , Fármacos Anti-VIH/uso terapéutico , Antirretrovirales/economía , China , Estudios de Cohortes , Análisis Costo-Beneficio , Infecciones por VIH/economía , Seropositividad para VIH/tratamiento farmacológico , Homosexualidad Masculina/estadística & datos numéricos , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Profilaxis Pre-Exposición/métodos , Prevalencia , Estudios Prospectivos , Años de Vida Ajustados por Calidad de Vida , Prevención Secundaria/economía , Resultado del Tratamiento
18.
AIDS Behav ; 22(4): 1217-1227, 2018 04.
Artículo en Inglés | MEDLINE | ID: mdl-28707025

RESUMEN

Long-acting injectable (LAI) formulations of antiretrovirals (ARVs) as pre-exposure prophylaxis (PrEP) could be an attractive alternative for men who have sex with men (MSM) who are interested in ARV-based biomedical prevention but will not use a daily pill. This study investigated interest in LAI-PrEP in a cohort of MSM in China and characterized how MSM willing to use only injectable PrEP differed from MSM who would use PrEP regardless of modality or not at all. Demographic, behavioral, and risk perception measures were collected and associations investigated. A licensed LAI-PrEP agent would increase the proportion interested in PrEP by 24.5% over oral PrEP alone. Combining interest in oral and injectable PrEP, 78.5% of the sample could be covered if reported interest in PrEP translated into actual uptake. Partnership factors differentiated those who would be willing to use only LAI-PrEP versus any PrEP modality, while higher self-perception of risk was associated with interest in LAI-PrEP versus no PrEP. The addition of a second PrEP modality could yield increased population coverage of PrEP. Social and behavioral research should be undertaken in parallel with clinical development of injectable PrEP agents to identify characteristics of those who are not interested in oral PrEP but would take advantage of ARV-based prevention with the introduction of an injectable product.


Asunto(s)
Fármacos Anti-VIH/administración & dosificación , Infecciones por VIH/prevención & control , Homosexualidad Masculina/psicología , Aceptación de la Atención de Salud/psicología , Profilaxis Pre-Exposición/métodos , Adulto , China , Estudios de Cohortes , Homosexualidad Masculina/etnología , Humanos , Inyecciones , Masculino , Aceptación de la Atención de Salud/etnología
19.
AIDS Behav ; 22(4): 1209-1216, 2018 04.
Artículo en Inglés | MEDLINE | ID: mdl-28744666

RESUMEN

This study aimed to identify patients' physical and psychosocial experiences of an investigational long-acting injectable PrEP product to aid in the development of patient and provider education materials. Twenty-eight participants of a Phase 2 safety, tolerability, and acceptability study of long-acting integrase inhibitor cabotegravir (CAB-LA) were interviewed on their physical and psychosocial experiences of the injections. Five themes emerged through a framework analysis on these interview transcripts: (1) injection-related pain is highly variable across individuals; (2) pain is more impactful after the injections than during; (3) patient anxiety is critical, but does not determine the experience of injections and decreases over time; (4) intimacy and awkwardness of gluteal injections impacts patients' experiences; (5) patient education and care strategies can mitigate the above factors. These findings can inform further sociobehavioral research within Phase 3 efficacy trials of CAB-LA, as well as patient education and provider guidance for future injectable PrEP products.


Asunto(s)
Infecciones por VIH/prevención & control , Inhibidores de Integrasa/administración & dosificación , Aceptación de la Atención de Salud , Educación del Paciente como Asunto , Profilaxis Pre-Exposición/métodos , Piridonas/administración & dosificación , Adulto , Fármacos Anti-VIH/administración & dosificación , Infecciones por VIH/tratamiento farmacológico , Homosexualidad Masculina , Humanos , Inyecciones Intramusculares , Entrevistas como Asunto , Masculino , Investigación Cualitativa
20.
BMC Infect Dis ; 17(Suppl 1): 701, 2017 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-29143673

RESUMEN

BACKGROUND: Innovation contests are a novel approach to elicit good ideas and innovative practices in various areas of public health. There remains limited published literature on approaches to deliver hepatitis testing. The purpose of this innovation contest was to identify examples of different hepatitis B and C approaches to support countries in their scale-up of hepatitis testing and to supplement development of formal recommendations on service delivery in the 2017 World Health Organization hepatitis B and C testing guidelines. METHODS: This contest involved four steps: 1) establishment of a multisectoral steering committee to coordinate a call for contest entries; 2) dissemination of the call for entries through diverse media (Facebook, Twitter, YouTube, email listservs, academic journals); 3) independent ranking of submissions by a panel of judges according to pre-specified criteria (clarity of testing model, innovation, effectiveness, next steps) using a 1-10 scale; 4) recognition of highly ranked entries through presentation at international conferences, commendation certificate, and inclusion as a case study in the WHO 2017 testing guidelines. RESULTS: The innovation contest received 64 entries from 27 countries and took a total of 4 months to complete. Sixteen entries were directly included in the WHO testing guidelines. The entries covered testing in different populations, including primary care patients (n = 5), people who inject drugs (PWID) (n = 4), pregnant women (n = 4), general populations (n = 4), high-risk groups (n = 3), relatives of people living with hepatitis B and C (n = 2), migrants (n = 2), incarcerated individuals (n = 2), workers (n = 2), and emergency department patients (n = 2). A variety of different testing delivery approaches were employed, including integrated HIV-hepatitis testing (n = 12); integrated testing with harm reduction and addiction services (n = 9); use of electronic medical records to support targeted testing (n = 8); decentralization (n = 8); and task shifting (n = 7). CONCLUSION: The global innovation contest identified a range of local hepatitis testing approaches that can be used to inform the development of testing strategies in different settings and populations. Further implementation and evaluation of different testing approaches is needed.


Asunto(s)
Hepatitis B/diagnóstico , Hepatitis C/diagnóstico , Guías como Asunto , Hepatitis B/economía , Hepatitis C/economía , Humanos , Tamizaje Masivo/economía , Atención Primaria de Salud/economía , Salud Pública/economía , Organización Mundial de la Salud
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