RESUMO
Objective: To study the presence of SARS-CoV-2 on surfaces (high, medium and low contact) and airs in non-sanitary spaces with high public influx to evaluate the risk of environmental contagion.Methods: Surfaces and airs were analysed by RT-qPCR to detect the presence of SARS-CoV-2.Results: 394 surfaces and air samples were obtained from spaces with high public influx such as offices, shopping centres and nursing homes. The virus was not detected in any of the samples analysed.Conclusion: Although we cannot emphatically conclude that there is no risk of environmental 27 infection by SARS-CoV-2 in non-sanitary spaces, we can affirm that the risk is almost non- existent.
RESUMO
Introduction: Most reports related to humoral immune response to COVID 19 vaccines in people with Multiple Sclerosis (pwMS) were performed on mRNA-based vaccines. Objective(s): to analyze the longitudinal humoral immune responses to adenovirus-based vaccines (Sputnik V and AZD1222) in pwMS under different diseases modifying therapies (DMTs) Methods: IgG anti- SARS-COV-2 spike titers in a cohort of 101 pwMS and 28 healthy controls (HC) were measured 6 weeks after vaccination using the COVID-AR kit according to the manufacture instructions. Both patients and controls received two or three doses of Sputnik, AZD1222 or a mixed schedule (MS) of both vaccines. The neutralizing capacity was evaluated by measuring antibody neutralizing titers using SARS COV-2 pseudotyped particles. Result(s): 60.5% of pwMS were female, mean EDSS: 2.49 +/-1.5, age: 36.6 +/-10.7, disease duration 7.6 +/- 5.1 years. DMTs: 45 pwMS were under fingolimod, 23 under dimethyl fumarate, 14 under cladribine and 19 under antiCD20 monoclonal antibodies. Vaccines: 35.7% Sputnik V, 51.9% AZD1222 and 12.4 % MS. No antibody response to a 2nd dose was found in 41.3% of pwMS under fingolimod and 73.6% under antiCD20. We found a correlation between lower lymphocyte count and lower antibody titers in pwMS under fingolimod (r: 0.67, 95% CI: 0.46-0.81, p=<=0.0001). A correlation was also found between the antibody titer and the last dose of antiCD20 (r: 0.49, 95% CI: 0.03-0.7, p=0.03). In March 2022, 57 pwMS received their 3nddose, 6 patients under fingolimod and 7 under antiCD20 remained without any antibody response. We did not find differences in the neutralization capacity with different DMT and or vaccines. Multivariate regression analysis showed antiCD20 (beta= -,349, 95% CI: -3655.6-369.01, p=0.017) and fingolimod (beta=-,399, 95% CI: -3363.8-250.9, p=0.023) treatments as independent factor associated with low antibody response (r2 adjusted=0.157). Conclusion(s): This is the first report of longitudinal humoral immune response of patients under adenovirus-based vaccines, specially Sputnik V, that demonstrate that these vaccines have similar results to those obtained with mRNA-based vaccines.
RESUMO
Objetivo: Estudiar la presencia de SARS-CoV-2 en superficies (alto, medio y bajo contacto) y aires de espacios no sanitarios pero de elevada afluencia de público para evaluar el riesgo de contagio ambiental. Método: Se ha realizado el análisis de las superficies y de los aires por RT-qPCR para detectar la presencia de SARS-CoV-2. 10 Resultados: Se obtuvieron 394 superficies y 23 muestras de aire de espacios de alta afluencia de personas como oficinas, centros comerciales y residencias de ancianos. El virus no fue detectado en ninguna de las muestras analizadas. Conclusión: Aunque no podemos concluir rotundamente que no existe un riesgo de infección ambiental por SARS-CoV-2 en espacios no sanitarios, sí que podemos afirmar que el riesgo es casi nulo.