Alliance for Pandemic Preparedness

June 11, 2020

Genomic Surveillance Reveals Multiple Introductions of SARS-CoV-2 into Northern California

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  • Phylogenetic analyses of samples from 36 patients in Northern California and the Grand Princess cruise ship showed at least 7 different SARS-CoV-2 lineages were introduced into California, including the epidemic WA1 strains associated with Washington State, with lack of a predominant lineage and limited transmission between communities. The authors conclude that these findings support contact tracing, social distancing, and travel restrictions to contain SARS-CoV-2 spread in California and other states. 

Deng et al. (June 8, 2020). Genomic Surveillance Reveals Multiple Introductions of SARS-CoV-2 into Northern California. Science. https://doi.org/10.1126/science.abb9263