Abstract
BackgroundThe SARS-CoV-2 pandemic affected the school-aged population because of the disease itself and due to the measures applied for prevention and control of the infection. The aim of the study was to evaluate the effect of population-based vaccination against COVID-19 on the incidence of infection in school settings. Material and methodsA retrospective descriptive study of COVID-19 cases and school outbreaks was carried out at the province level. Students, teachers and staff from different educational stages of the schools were included. The outcome measure was the incidence according to educational stage, case profile and clinic during the first of the academic year 2020/2021 versus the same period 2021/2022. ResultsThe total incidence of SARS-CoV-2 in classrooms was 2470 cases per 100,000 population in the first trimester of the academic year 2020/2021 and 2720 cases per 100,000 population in the same period 2021/2022. The number of reported school outbreaks was 7 times higher in this second period; and the risk of infection in classrooms over 12 years of age (students and teachers) was reduced by 43.1% (vaccinated in high percentage). ConclusionsThis study shows a reduction in transmission of SARS-CoV-2 infection in students of higher educational stages (secondary and high school) during the first of the academic year 2021/2022 (group with high vaccination coverage at the beginning of the period) compared to the previous school year (without vaccination).
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