Genomic surveillance reveals multiple introductions of SARS-CoV-2 into Northern California

  • Xianding Deng
  • , Wei Gu
  • , Scot Federman
  • , Louis du Plessis
  • , Oliver G. Pybus
  • , Nuno R. Faria
  • , Candace Wang
  • , Guixia Yu
  • , Brian Bushnell
  • , Chao Yang Pan
  • , Hugo Guevara
  • , Alicia Sotomayor-Gonzalez
  • , Kelsey Zorn
  • , Allan Gopez
  • , Venice Servellita
  • , Elaine Hsu
  • , Steve Miller
  • , Trevor Bedford
  • , Alexander L. Greninger
  • , Pavitra Roychoudhury
  • Lea M. Starita, Michael Famulare, Helen Y. Chu, Jay Shendure, Keith R. Jerome, Catie Anderson, Karthik Gangavarapu, Mark Zeller, Emily Spencer, Kristian G. Andersen, Duncan MacCannell, Clinton R. Paden, Yan Li, Jing Zhang, Suxiang Tong, Gregory Armstrong, Scott Morrow, Matthew Willis, Bela T. Matyas, Sundari Mase, Olivia Kasirye, Maggie Park, Godfred Masinde, Curtis Chan, Alexander T. Yu, Shua J. Chai, Elsa Villarino, Brandon Bonin, Debra A. Wadford, Charles Y. Chiu

Research output: Contribution to journalArticlepeer-review

173 Scopus citations

Abstract

The coronavirus disease 2019 (COVID-19) pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has spread globally, with >365,000 cases in California as of 17 July 2020. We investigated the genomic epidemiology of SARS-CoV-2 in Northern California from late January to mid-March 2020, using samples from 36 patients spanning nine counties and the Grand Princess cruise ship. Phylogenetic analyses revealed the cryptic introduction of at least seven different SARS-CoV-2 lineages into California, including epidemic WA1 strains associated with Washington state, with lack of a predominant lineage and limited transmission among communities. Lineages associated with outbreak clusters in two counties were defined by a single base substitution in the viral genome. These findings support contact tracing, social distancing, and travel restrictions to contain the spread of SARS-CoV-2 in California and other states.

Original languageEnglish
Pages (from-to)582-587
Number of pages6
JournalScience
Volume369
Issue number6503
DOIs
StatePublished - 31 Jul 2020
Externally publishedYes

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