Background Mexico is one of the countries with the highest number of deaths from the COVID-19 pandemic. In spite of this high mortality, in Mexico the number of confirmed cases and diagnostic tests per million population are lower than for other comparable countries, which leads to uncertainty about the actual extent of the pandemic. In Mexico City, healthcare workers represent an important fraction of individuals with SARS-CoV-2 infection. We performed a cross-sectional study whose objective was to estimate the frequency of antibodies to SARS-CoV-2 and identify associated factors in healthcare workers at a large hospital in Mexico City. Methods We conducted a serological survey in a non-COVID national referral teaching hospital. The study population included all the personnel that works, in any capacity, in the hospital. From this population we selected a representative sample of 300 individuals. Blood samples were collected and questionnaires were applied between August 10 th and September 9 th , 2020. Results ELISA results indicate a serological prevalence of SARS-CoV-2 infection of 13.0%. Working in the janitorial and security groups, having an educational level below a university degree, and living with a larger number of people, were all identified as sociodemographic factors that increase the probability of having SARS-CoV-2 infection. Conclusions Less favored socioeconomic groups face significantly higher prospects of experiencing SARS-CoV-2 infection and in institutions such as ours, providing janitorial and security workgroups with additional testing and counseling could help to limit the spread of contagion. The rate from the official number of confirmed cases in Mexico City is substantially smaller than the seropositive rate identified in this work.
【초록키워드】 SARS-CoV-2, pandemic, antibody, cross-sectional, SARS-COV-2 infection, COVID-19 pandemic, hospital, diagnostic test, healthcare worker, ELISA, Spread, Prevalence, Probability, death, group, serological, questionnaire, seropositive, Frequency, Contagion, Mexico City, confirmed case, Factor, study population, individual, blood sample, help, high mortality, fraction, working, National, serological survey, counseling, Sociodemographic factor, country, limit, Result, selected, highest, identify, performed, collected, conducted, applied, significantly higher, comparable, individuals, groups, 【제목키워드】 SARS-COV-2 infection, hospital, healthcare worker, Prevalence, Mexico City, Factor,