Passarelli VC, Faico-Filho K, Moreira LVL, Cunha AP, Carvalho JMA, Barbosa GR, Camargo C, Conte DD, Perosa AH, Bellei N. Asymptomatic COVID-19 in hospital visitors: underestimated potential of viral shedding. Int J Infect Dis. 2020 Oct 28:S1201-9712(20)32261-X. doi: 10.1016/j.ijid.2020.10.057. Epub ahead of print. PMID: 33129961; PMCID: PMC7592020.
In one day, 6 in 150 (4%) asymptomatic visitors were diagnosed with COVID-19 at a hospital with universal masking policy. Two inpatients (contacts) subsequentely developed symptoms. More rigorous protective measures during visitation periods may need to be included in infection control practices in order to reduce nosocomial transmissions.
