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abstractpubmed· Abstract 2020· item PMID:32163030

Indirect Virus Transmission in Cluster of COVID-19 Cases, Wenzhou, China, 2020. To determine possible modes of virus transmission, we investigated a cluster of coronavirus disease cases associated with a shopping mall in Wenzhou, China. Data indicated that indirect transmission of the causative virus occurred, perhaps resulting from virus contamination of common objects, virus aerosolization in a confined space, or spread from asymptomatic infected persons.