| Autor: |
Vargas-De-León C; División de Investigación, Hospital Juárez de México, Ciudad de México 07760, Mexico.; Laboratorio de Modelación Bioestadística para la Salud, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Ciudad de México 07738, Mexico., Cureño-Díaz MA; Dirección de Investigación y Enseñanza, Hospital Juárez de México, Ciudad de México 07760, Mexico., Salazar MI; Laboratorio Nacional de Vacunología y Virus Tropicales, Escuela Nacional de Ciencias Biológicas (ENCB), Instituto Politécnico Nacional, Ciudad de México 11340, México., Cruz-Cruz C; División de Investigación, Hospital Juárez de México, Ciudad de México 07760, Mexico., Loyola-Cruz MÁ; División de Investigación, Hospital Juárez de México, Ciudad de México 07760, Mexico., Durán-Manuel EM; División de Investigación, Hospital Juárez de México, Ciudad de México 07760, Mexico., Zamora-Pacheco ER; Laboratorio de Modelación Bioestadística para la Salud, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Ciudad de México 07738, Mexico., Bravata-Alcántara JC; Laboratorio de Diagnóstico Molecular, Hospital Juárez de México, Ciudad de México 07760, Mexico., Lugo-Zamudio GE; Dirección General, Hospital Juárez de México, Ciudad de México 07760, Mexico., Fernández-Sánchez V; División de Investigación, Hospital Juárez de México, Ciudad de México 07760, Mexico., Bello-López JM; División de Investigación, Hospital Juárez de México, Ciudad de México 07760, Mexico., Ibáñez-Cervantes G; División de Investigación, Hospital Juárez de México, Ciudad de México 07760, Mexico.; Laboratorio de Modelación Bioestadística para la Salud, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Ciudad de México 07738, Mexico. |
| Abstrakt: |
One of the priority lines of action to contain the SARS-CoV-2 pandemic was vaccination programs for healthcare workers. However, with the emergence of highly contagious strains, such as the Omicron variant, it was necessary to know the serological status of health personnel to make decisions for the application of reinforcements. The aim of this work was to determine the seroprevalence against SARS-CoV-2 in healthcare workers in a Mexican hospital after six months of the administration of the Pfizer-BioNTech vaccine (two doses, 4 weeks apart) and to investigate the association between comorbidities, response to the vaccine, and reinfections. Neutralizing antibodies against SARS-CoV-2 were determined using ELISA assays for 262 employees of Hospital Juárez de México with and without a history of COVID-19. A beta regression analysis was performed to study the associated comorbidities and their relationship with the levels of antibodies against SARS-CoV-2. Finally, an epidemiological follow-up was carried out to detect reinfections in this population. A significant difference in SARS-CoV-2 seroprevalence was observed in workers with a history of COVID-19 prior to vaccination compared to those without a history of the disease (MD: 0.961 and SD: 0.049; <0.001). Beta regression showed that workers with a history of COVID-19 have greater protection compared to those without a history of the infection. Neutralizing antibodies were found to be decreased in alcoholic and diabetic subjects (80.1%). Notably, eight cases of Omicron reinfections were identified, and gender and obesity were associated with the presence of reinfections (6.41 OR; 95% BCa CI: 1.15, 105.0). The response to the vaccine was influenced by the history of SARS-CoV-2 infection and associated comorbidities. The above highlights the importance of prioritizing this segment of the population for reinforcements in periods of less than one year to guarantee their effectiveness against new variants. |
