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We analyzed 1,303 SARS-CoV-2 whole-genome sequences from Vietnam, and found the Alpha and Delta variants were responsible for a large nationwide outbreak of COVID-19 in 2021. The Delta variant was confined to the AY.57 lineage and caused >1.7 million infections and >32,000 deaths. Viral transmission was strongly affected by nonpharmaceutical interventions.

Original publication

DOI

10.3201/eid2905.221787

Type

Journal article

Journal

Emerg Infect Dis

Publication Date

05/2023

Volume

29

Pages

1002 - 1006

Keywords

Alpha variant, COVID-19, Delta variant, SARS-CoV-2, Vietnam, coronavirus disease, coronaviruses, outbreak, respiratory infections, severe acute respiratory syndrome coronavirus-2, spatiotemporal evolution, viruses, zoonoses, Humans, COVID-19, SARS-CoV-2, Vietnam, Disease Outbreaks