Genetic data show how a single superspreading event sent coronavirus across Massachusetts — and the nation – The Washington Post

By the meetings end on Feb. 27, the infection had infiltrated many more people: a research director, a photographer, the general manager for the companys east division. They took the virus home with them to the Boston suburbs, Indiana and North Carolina, to Slovakia, Australia and Singapore.
Over the following two weeks, the virus that circulated among conference attendees was implicated in at least 35 new cases. In April, the same distinctive viral sub-strain swirled through two Boston homeles…

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