ARTICLE | doi:10.20944/preprints202209.0328.v1
Subject: Medicine & Pharmacology, Other Keywords: SARS-CoV-2; COVID-19; outpatient cohort; seroprevalence; mild infections; asymptomatic cases; COVID-19 contacts; PCR-positivity and symptoms; first year of the pandemic; Hungary
Online: 22 September 2022 (02:08:09 CEST)
We aimed to estimate the proportion of the population infected with SARS-CoV-2 in the first year of the pandemic. The study population consisted of outpatient adults with mild or no COVID-19 symptoms, and was divided into subpopulations with different levels of exposures. Of the subpopulation without known previous COVID-19 contacts 4143, of the subpopulation with known COVID-19 contacts 594 persons were investigated. IgG- and IgA-seroprevalence and RT-PCR positivity were determined in context with COVID-19 symptoms. We hope to have contributed to the understanding of the significance of the asymptomatic and mild infections in the long persistence of the pandemic.