COVID-19 — Worldwide/Unknown
Abstract
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SARS-CoV-2 has caused a severe, ongoing outbreak of COVID-19 in Massachusetts with 111 070 confirmed cases and 8433 deaths as of August 2020. To investigate the introduction, spread, and epidemiology of COVID-19 in the Boston area, we sequenced and analyzed 772 complete SARS-CoV-2 genomes from the region, including nearly all confirmed cases within the first week of the epidemic and hundreds of cases from major outbreaks at a conference, a nursing facility, and among
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