We analyzed 2 clusters of 12 patients in Vietnam with severe acute respiratory syndrome coronavirus 2 infection during January-February 2020. Analysis indicated virus transmission from a traveler from China. One asymptomatic patient demonstrated virus shedding, indicating potential virus transmission in the absence of clinical signs and symptoms.
Keywords: 2019 novel coronavirus disease; COVID-19; SARS-CoV-2; Vietnam; presymptomatic; respiratory infections; severe acute respiratory syndrome coronavirus 2; travelers; viruses; zoonoses.