SARS-CoV-2 seroprevalence and transmission risk factors among high-risk close contacts: a retrospective cohort study. Lancet Infect Dis. 2020 Nov 2:S1473-3099(20)30833-1. doi: 10.1016/S1473-3099(20)30833-1. Epub ahead of print. PMID: 33152271.Leer más..