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A cluster of severe acute respiratory syndrome coronavirus 2 infections in Danang, Vietnam, began July 25, 2020, and resulted in 551 confirmed cases and 35 deaths as of February 2021. We analyzed 26 sequences from this cluster and identified a novel shared mutation in nonstructural protein 9, suggesting a single introduction into Vietnam.

Original publication




Journal article


Emerg Infect Dis

Publication Date





1519 - 1521


2019 novel coronavirus disease, COVID-19, Danang, SARS-CoV-2, Vietnam, coronavirus disease, molecular epidemiology, reintroduction, respiratory infections, severe acute respiratory syndrome coronavirus 2, viruses, zoonoses, COVID-19, Humans, Mutation, RNA-Binding Proteins, SARS-CoV-2, Vietnam, Viral Proteins