Associations of Early COVID-19 Cases in San Francisco With Domestic and International Travel

Wei Gu; Xianding Deng; Kevin Reyes; Elaine Hsu; Candace Wang; Alicia Sotomayor-Gonzalez; Scot Federman; Brian Bushnell; Steve Miller; Charles Y Chiu

doi:10.1093/cid/ciaa599

Associations of Early COVID-19 Cases in San Francisco With Domestic and International Travel

Clin Infect Dis. 2020 Dec 31;71(11):2976-2980. doi: 10.1093/cid/ciaa599.

Authors

Wei Gu^{1

2}, Xianding Deng^{1

2}, Kevin Reyes^{1

2}, Elaine Hsu^{1

2}, Candace Wang^{1

2}, Alicia Sotomayor-Gonzalez^{1

2}, Scot Federman^{1

2}, Brian Bushnell³, Steve Miller^{1

2}, Charles Y Chiu^{1

2

4}

Affiliations

¹ Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California, USA.
² University of California, San Francisco-Abbott Viral Diagnostics and Discovery Center, San Francisco, California, USA.
³ Lawrence Berkeley National Laboratory, Berkeley, California, USA.
⁴ Division of Infectious Diseases, Department of Medicine, University of California, San Francisco, San Francisco, California, USA.

Abstract

In early-to-mid March 2020, 20 of 46 (43%) COVID-19 cases at a tertiary care hospital in San Francisco, California were travel related. Cases were significantly associated with travel to either Europe (odds ratio, 6.1) or New York (odds ratio, 32.9). Viral genomes recovered from 9 of 12 (75%) cases co-clustered with lineages circulating in Europe.

Keywords: SARS coronavirus 2 (SARS-CoV-2); hospital epidemiology; pandemic; risk-based screening; travel history.

MeSH terms

COVID-19*
Europe
Humans
New York
SARS-CoV-2
San Francisco / epidemiology
Travel
Travel-Related Illness

Abstract

MeSH terms

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