Effectiveness of JYNNEOS vaccine against symptomatic mpox disease in adult men in Los Angeles County, August 29, 2022 to January 1, 2023.

We describe real-world estimates of JYNNEOS vaccine effectiveness (VE) against symptomatic mpox in Los Angeles County (LAC). We conducted a retrospective cohort study of men aged ≥18 years residing in LAC who were at risk for mpox and eligible for the JYNNEOS vaccine from 5/19/2022 to 1/1/2023. Case demographics and route of JYNNEOS administration were obtained through vaccine administration data systems. HIV and sexually transmitted infection (STI) status was obtained through disease reporting systems for HIV and STI diagnoses in LAC. To estimate VE, we calculated weekly incidence of confirmed mpox for unvaccinated, partially vaccinated (episode date ≥14 days after first dose), and fully vaccinated (episode date ≥14 days after second dose) cohorts starting on 8/29/2022, when fully vaccinated coverage exceeded 3 %, and ending on 1/1/2023. Overall, 2,171 men had confirmed mpox, and 1,002 (46 %) of those were persons living with diagnosed HIV (PLWDH). 2,019 (93 %) mpox cases were unvaccinated, 114 (5 %) were partially vaccinated and 38 (2 %) were fully vaccinated. VE was 69 % (95 % CI 59-77) for partially vaccinated and 84 % (95 % CI 80-87) for fully vaccinated individuals. Among PLWDH, VE was 72 % (95 % CI 57-82) for fully vaccinated and 28 % (95 % CI -96 to 73) VE for partially vaccinated individuals. Among persons not living with diagnosed HIV, VE was 88 % (95 % CI 86-90) for fully vaccinated and 80 % (95 % CI 76-83) for partially vaccinated individuals. Of 111 individuals hospitalized with mpox, one was partially vaccinated, and the remaining were unvaccinated. Our results align with other published studies that reported that two doses of the JYNNEOS vaccine provided significant protection against symptomatic mpox.

Countering Mpox Vaccination Disparities in Los Angeles County, California, May-December 2022.

Providing equitable access to vaccines for individuals at risk for mpox was critical for containing the 2022 mpox outbreak in Los Angeles County, California. Eligible non-Hispanic Black/African American and Latinx individuals had lower vaccine uptake than did non-Hispanic White individuals, despite having higher mpox case rates. Strategies to address disparities in vaccine uptake included using familiar messaging technology to reach individuals at risk for mpox, using partnerships with community-based organizations to raise mpox awareness, and bringing vaccines to locations convenient to at-risk individuals to improve access. (Am J Public Health. 2023;113(12):1258-1262. https://doi.org/10.2105/AJPH.2023.307409).

Effectiveness and feasibility of three types of parent reminders to increase adolescent human papillomavirus (HPV) vaccination.

Parent reminders have produced modest improvements in human papillomavirus (HPV) vaccination among adolescents. However, little prior research has compared the effectiveness and feasibility of different HPV reminder types in resource-limited settings. We conducted a quasi-experimental study (2016-2017) to evaluate the effectiveness of three parent reminder types (mailed letters, robocalls, text messages) on next-dose HPV vaccine receipt among 12-year-olds in a large Federally Qualified Health Center in Los Angeles County. Six clinics were matched into three pairs: randomly assigning one clinic within each pair to intervention and control. Intervention clinics were randomly assigned to deliver one of the three parent reminder types. We calculated rates of next-dose vaccine receipt and assessed intervention effects using logistic regression models. We calculated the proportion of each type of reminder successfully delivered as a feasibility measure. The study sample comprised 877 12-year-olds due for an HPV vaccine dose (47% female, >85% Latino). At 4-month follow-up, 23% of intervention patients received an HPV vaccine dose compared to only 12% of control patients. Overall, receipt of any reminder increased rates of the next-needed HPV vaccine compared to usual care (p = 0.046). Significant improvements were observed for text reminders (p = 0.036) and boys (p = 0.006). Robocalls were the least feasible reminder type. Text message reminders are feasible and effective for promoting HPV vaccination. Future research is needed to assess the effectiveness and feasibility of reminders compared to other vaccine promotion strategies.

Impact of a Multi-Level, Multi-Component, System Intervention on HPV Vaccination in a Federally Qualified Health Center.

BACKGROUND: Human papillomavirus (HPV) vaccines can significantly reduce the burden of HPV-associated cancers, but remain underutilized. We evaluated a multi-component, system-level intervention to improve HPV vaccination in a large Federally Qualified Health Center (FQHC) that serves a primarily low income Latino population. METHODS: From January 2015 through March 2017, we evaluated the effectiveness of a multi-component, system-level intervention to improve HPV vaccination rates in eight clinics randomly assigned to study condition (four intervention, four usual care). The intervention included parent reminders for HPV vaccine series completion, provider training, clinic-level audit and feedback, and workflow modifications to reduce missed opportunities for vaccination. Using a difference-in-differences approach, we compared HPV vaccination rates among patients, ages 11 to 17 during a 12-month preintervention period and a 15-month intervention period. Linear mixed models were used to estimate intervention effects on vaccine initiation and completion. RESULTS: The sample included approximately 15,000 adolescents each quarter (range 14,773-15,571; mean age 14 years; 51% female, 88% Latino). A significantly greater quarterly increase in HPV vaccine initiation was observed for intervention compared with usual care clinics (0.75 percentage point greater increase, P < 0.001), corresponding to 114 additional adolescents vaccinated per quarter. The intervention led to a greater increase in HPV vaccine completion rates among boys (0.65 percentage point greater increase, P < 0.001), but not girls. CONCLUSIONS: Our system-level intervention was associated with modest improvements in HPV vaccine initiation overall and completion among boys. IMPACT: Study findings have implications for reducing HPV-related cancers in safety net populations.

Increasing HPV Vaccination among Low-Income, Ethnic Minority Adolescents: Effects of a Multicomponent System Intervention through a County Health Department Hotline.

BACKGROUND: Introduction of the human papillomavirus (HPV) vaccine in 2006 was a game-changing advance in cancer control. Despite the vaccine's potential cancer prevention benefits, uptake remains low. We utilized a randomized design to evaluate a multicomponent intervention to improve HPV vaccine uptake among low-income, ethnic minority adolescents seeking services through a county health department telephone hotline. METHODS: Hotline callers who were caregivers of never-vaccinated adolescents (11-17 years) were randomized by call-week to intervention or control conditions. The intervention included brief telephone and print education, delivered in multiple languages, and personalized referral to a low-cost/free vaccine provider. Participants completed baseline (n = 238), 3-month (n = 215), and 9-month (n = 204) telephone follow-up surveys. RESULTS: HPV vaccine initiation rates increased substantially by 9-month follow-up overall, although no differences were observed between intervention and control groups (45% vs. 42%, respectively, P > 0.05). We also observed significant improvements in perceived HPV risk, barriers to vaccination, and perceived knowledge in both study conditions (P < 0.05). CONCLUSIONS: A low-intensity county hotline intervention did not produce a greater increase in HPV vaccination rates than routine practice. However, 44% of unvaccinated adolescents in both conditions received at least one dose of the vaccine, which can be viewed as a successful public health outcome. Future studies should evaluate more intensive interventions that address accessing and utilizing services in complex safety net settings. IMPACT: Study results suggest the need for investigators to be aware of the potential priming effects of study participation, which may obscure the effect of low-intensity interventions.

Success of an EMR-Driven Postpartum Intervention to Improve HPV Vaccination Rates.

Human papillomavirus vaccination (HPV) remains low in the United States. The inpatient postpartum setting provides an innovative opportunity to vaccinate eligible patients. This study evaluated two different interventions to improve HPV vaccination rates in hospitalized postpartum patients: a nurse based protocol and an electronic medical record (EMR) postpartum order prompt. This was a comparative intervention study performed in a prospective cohort of postpartum patients at two affiliated County Hospitals. The intervention was conducted over a 6-month period aimed at increasing HPV vaccination rates through a nurse based protocol at one hospital (H-NBP) and an EMR postpartum order prompt at the second hospital (H-EMR). Outcomes measures included vaccine administration, patient refusal, and vaccine wastage. A multiple logistic regression model was used to compare outcomes. At H-NBP, 143 vaccine-eligible patients (74%) were identified of which 44 (32%) received the HPV vaccine, 66 (46%) refused, and 33 (21%) had missed opportunities. At H-EMR, 169 patients (87%) were identified as vaccine-eligible of which 111 (66%) received the HPV4 vaccine, 24 (14%) refused and 34 (20%) had missed opportunities. After adjusting for sociodemographic variables, patients at H-EMR were nearly 6 times more likely than patients at H-NBP to undergo postpartum HPV vaccination (OR 5.865, CI 3.358-10.245, p value < 0.0001). An EMR prompt offers a greater impact on HPV vaccination rates than a nursing protocol. The feasibility and success of inpatient postpartum HPV vaccination interventions as demonstrated in this study provides insights on how to approach vaccination strategies in nontraditional clinical settings.

Disparities in parental human papillomavirus (HPV) vaccine awareness and uptake among adolescents.

Trends in HPV vaccine awareness among parents of adolescent girls and boys (ages 13-17) and HPV vaccine uptake (≥1 dose) among girls (ages 13-17) were evaluated in Los Angeles County, California. Between 2007 and 2011, parental HPV vaccine awareness increased from 72% to 77% overall, with significant increases among mothers, Latinos, and respondents with daughters and Medi-Cal insured children. In 2011, parents who were male, older, less educated, Asian/Pacific Islander, and had sons remained significantly less likely to be aware. HPV vaccine initiation among daughters nearly doubled from 25% in 2007 to 48% in 2011, and girls who were older, uninsured, and had access-related barriers showed the largest improvements. In 2011, daughters who were younger and who had older and African American parents were at risk for low uptake. Thus, initiatives targeting male and younger adolescents, culturally-relevant information, and access to vaccination may help to reduce identified disparities.

Implementation of HPV vaccination guidelines in a diverse population in Los Angeles: Results from an environmental scan of local HPV resources and needs.

Research shows that vaccination against human papillomavirus (HPV) infection is one of the most effective methods for reducing risk for cervical cancer; it also protects against other HPV-related cancers. Controversies exist regarding HPV vaccination in several communities; which may in part explain why although rates of HPV vaccination are increasing nationwide, Los Angeles County (LAC) data show that many adolescents are still not vaccinated. These adolescents remain at high-risk for infection. Using community-based participatory principles, we conducted an environmental scan that included a literature review, the development of a community advisory board, community feedback from HPV community meetings, and interviews with stakeholders to understand attitudes toward HPV vaccination and their impact in follow through with HPV vaccines. Twenty-eight key stakeholders participated in our coalition comprised of community organizations and clinics with strong ties to the local community. This is the only coalition dedicated exclusively to improving HPV vaccine uptake in LAC. Of these, twenty-one participated in an environmental scan via qualitative interviews about HPV vaccination programs, service delivery priorities, and proposed steps to increase HPV vaccination uptake in LAC. The environmental scan revealed targets for future efforts, barriers to HPV uptake, and next steps for improving local HPV vaccination uptake rates. The environmental scan also identified local HPV vaccination interventions and resources. Although LAC has developed important efforts for vaccination, some interventions are no longer being implemented due to lack of funds; others have not been evaluated with sufficient outcome data. The risk for cervical and other HPV-related cancers could be greatly reduced in LAC if a multilevel, multicultural, and multilingual approach is taken to better understand rates of HPV vaccination uptake, particularly among racial/ethnic minorities and LGBTQ youth. Our environmental scan provides guidance on attitudes toward vaccination, and how best to address the needs of LAC families and providers.

Factors associated with HPV awareness among mothers of low-income ethnic minority adolescent girls in Los Angeles.

Among caregivers of adolescent girls, awareness of human papillomavirus (HPV) is strongly associated with vaccine uptake. Little is known, however, about the predictors of HPV awareness among low-income ethnic minority groups in the U.S. The purpose of this study is to understand demographic factors associated with HPV awareness among low-income, ethnic minority mothers in Los Angeles County. We conducted a cross-sectional study of caregivers of adolescent girls through the Los Angeles County Department of Public Health Office of Women's Health's hotline. The majority of the participants were foreign-born (88%), one quarter lacked a usual source of care, and one quarter lacked public or private health insurance for their daughter. We found that one in three participants had never heard of HPV or the vaccine. Mothers that were unaware of HPV were significantly more likely to conduct the interview in a language other than English and to lack health insurance for their daughters. HPV vaccine awareness was much lower in our caregiver sample (61%) than in a simultaneous national survey of caregivers (85%). The associations between lack of awareness and use of a language other than English, as well as lack of health insurance for their daughter indicate the need for HPV vaccine outreach efforts tailored to ethnic minority communities in the U.S.

Paradigm shifts: using a participatory leadership process to redesign health systems.

PURPOSE OF REVIEW: Physicians have increasingly given up private practices to become members of, and key stakeholders in, large healthcare systems. These systems are currently transforming to meet the Triple Aim: guaranteeing the equitable provision of high-quality, evidence-based care at a reasonable cost. Participatory leadership is an organizational change theory that engages key stakeholders as architects in the transformation process. This review highlights the utility of this leadership strategy in designing care for women's health. RECENT FINDINGS: Our blueprint describing participatory leadership theory in women's health systems change is discussed in three case studies, highlighting what we call the six Ps of participatory leadership: participants, principles, purpose, process, and power. The 'sixth P', product, can then be substantially influential in changing the paradigm of care. SUMMARY: Obstetrics and gynecology is increasingly practiced in large health systems responsible for the health of populations. Innovations in clinical practice impact care at the level of the individual. In order for advances in clinical practice to reach broad populations of women, they must be integrated into a delivery system. Physician engagement in leadership during this time of system transformation is of critical importance.

Proximity to safety-net clinics and HPV vaccine uptake among low-income, ethnic minority girls.

PURPOSE: Human Papillomavirus (HPV) vaccine uptake remains low. Although publicly funded programs provide free or low cost vaccines to low-income children, barriers aside from cost may prevent disadvantaged girls from getting vaccinated. Prior studies have shown distance to health care as a potential barrier to utilizing pediatric preventive services. This study examines whether HPV vaccines are geographically accessible for low-income girls in Los Angeles County and whether proximity to safety-net clinics is associated with vaccine initiation. METHODS: Interviews were conducted in multiple languages with largely immigrant, low-income mothers of girls ages 9 to 18 via a county health hotline to assess uptake and correlates of uptake. Addresses of respondents and safety-net clinics that provide the HPV vaccine for free or low cost were geo-coded and linked to create measures of geographic proximity. Logistic regression models were estimated for each proximity measure on HPV vaccine initiation while controlling for other factors. RESULTS: On average, 83% of the 468 girls had at least one clinic within 3-miles of their residence. The average travel time on public transportation to the nearest clinic among all girls was 21min. Average proximity to clinics differed significantly by race/ethnicity. Latinas had both the shortest travel distances (2.2 miles) and public transportation times (16min) compared to other racial/ethnic groups. The overall HPV vaccine initiation rate was 25%. Increased proximity to the nearest clinic was not significantly associated with initiation. By contrast, daughter's age and insurance status were significantly associated with increased uptake. CONCLUSIONS: This study is among the first to examine geographic access to HPV vaccines for underserved girls. Although the majority of girls live in close proximity to safety-net vaccination services, rates of initiation were low. Expanding clinic outreach in this urban area is likely more important than increasing geographic access to the vaccine for this population.

Exploring the role of neighborhood socio-demographic factors on HPV vaccine initiation among low-income, ethnic minority girls.

Little is known about whether neighborhood factors are associated with human papillomavirus (HPV) vaccine uptake, especially among disadvantaged groups that can benefit most from the vaccine. We used data collected from immigrant, low-income mothers of adolescent girls and data from the 2005-2009 American Community Survey to investigate the relationship between HPV vaccine initiation and neighborhood characteristics. We compared initiation rates across levels of neighborhood disadvantage and employed multilevel logistic regression models to examine contextual effects on uptake. Overall, 27 % of girls (n = 479) initiated the vaccine. Initiation rates were highest among girls from the most disadvantaged neighborhoods (30 %), however, neighborhood factors were not independently associated with vaccine initiation after adjusting for individual factors. Mother's awareness of HPV, age, and insurance status were strong predictors for initiation. Future interventions should focus on improving awareness among low-income mothers as well as targeting vulnerable families outside the catchment area of public programs.

Understanding suboptimal human papillomavirus vaccine uptake among ethnic minority girls.

BACKGROUND: The introduction of human papillomavirus (HPV) vaccines represents a breakthrough in the primary prevention of cervical cancer. However, little is known about vaccination uptake and correlates among low-income, ethnic minority, and immigrant populations in the U.S. who may benefit most from the vaccine. METHODS: Telephone interviews (N = 490) were conducted in six languages between January and November 2009 among mothers of vaccine-eligible girls (ages 9-18) using the Los Angeles County Department of Public Health, Office of Women's Health service referral hotline. HPV and vaccine awareness, knowledge, beliefs, barriers, and daughter's vaccine receipt were assessed. RESULTS: The sample consisted of low-income, uninsured, ethnic minority, and immigrant women. Only 29% of daughters initiated the vaccine and 11% received all three doses. No ethnic differences were observed in initiation or completion rates. Ethnic differences were observed in HPV awareness, perceived risk, and other vaccine-related beliefs. The strongest predictor of initiation was vaccine awareness (OR = 12.00). Daughter's age and reporting a younger acceptable age for vaccination were positively associated with initiation. Mothers of unvaccinated girls reported lacking information about the vaccine to make a decision (66%) and not knowing where they could obtain the vaccine (74%). CONCLUSION: Vaccination rates in this sample were lower than state and national estimates, and were associated with low levels of vaccine awareness. Interventions, including culturally targeted messaging, may be helpful for enhancing HPV-vaccine knowledge, modifying vaccine-related beliefs and increasing uptake. IMPACT: Our findings provide valuable guidance for developing interventions to address suboptimal HPV vaccination in high-risk groups.

The impact of social communication on perceived HPV vaccine effectiveness in a low-income, minority population.

OBJECTIVES: Perceived vaccine effectiveness is linked to vaccine-uptake. This study aims to determine if hearing about the HPV vaccine from family/friends (social source) or discussing the vaccine with family/friends (social discussion) is associated with perceived HPV vaccine effectiveness among female ethnic-minority, medical-decision-makers of vaccine-eligible girls. METHODS: Data come from a cross-sectional HPV vaccine telephone-survey administered by the Los Angeles County Office of Women's Health (OWH) hotline operators between January-November 2009. Among survey participants who reported awareness of the HPV vaccine (n=294), two logistic regression models of perceived HPV vaccine effectiveness were conducted; a source of information model with social source as the main predictor, and a discussion model with social discussion as the main predictor. These were adjusted for medical source and medical discussion, and covariates affecting interaction with the health care system. RESULTS: Women who heard about the HPV vaccine from a social source were more likely to perceive the vaccine as effective compared to those who did not report a social source of information (adjusted OR 4.78, 95% CI 1.76-12.98). Medical source of information was also associated with perceived vaccine effectiveness (adjusted OR 2.07, 95% CI 1.06-4.05). Those who reported social discussion, but not those who discussed the vaccine with a medical provider, had increased odds of perceived vaccine effectiveness (adjusted OR 1.98, 95% CI 1.04-3.78). CONCLUSIONS: Social source of information and social discussion were associated with perceived HPV vaccine effectiveness; this highlights the value of social communication among low-income minority women, and the need for vaccine-messaging interventions that utilize a social network approach.(Ethn Dis. 2011;21(4):495-501)

Variations in practice guideline adherence for abnormal cervical cytology in a county healthcare system.

BACKGROUND: Reduction in cervical cancer incidence and mortality is not only dependant on promoting cervical cancer screening but also on providing appropriate follow-up and treatment of abnormal cervical cytology. OBJECTIVES: The objective of this study was to determine variations in guideline adherence for women requiring abnormal cervical cytology follow-up. SUBJECTS: Subjects of the study are women 18 years or older with an abnormal Pap test in 2000 within a large county healthcare system (n = 8,571). MEASUREMENTS: Guideline adherence was determined by the presence or absence of the appropriate follow-up procedure within an acceptable time interval for each degree of cytological abnormality. Patients with no follow-up studies were deemed to be lost to follow-up. RESULTS: Of study subjects, 18.5% were lost to follow-up care. Of the remaining 6,987 women, 60.3% received optimal care, 9.4% received suboptimal care, and 30.3% received poor care. Follow-up rates were higher for patients with higher degree of cytological abnormality (OR, 1.29, 95% CI, 1.17-1.42), older patients (OR, 1.03, 95% CI, 1.02-1.030) and those receiving the index Pap test at a larger healthcare facility (OR, 1.13; 95% CI, 1.01-1.27). Receiving optimal care was positively correlated with higher degree of cytological abnormality (p < .0001) and larger facility size (p = .002). Regional variations in care demonstrated the largest cluster having the lowest lost to follow-up rate and the most optimal care. CONCLUSIONS: A significant number of women with abnormal cervical cytology are receiving less than optimal care. Further studies are required to determine the specific healthcare delivery practices that need to be targeted to improve guideline adherence for follow-up of abnormal cytology.