Covid-19 superspreading event in Boston may have led to 20,000 cases, researcher says – CNN

Covid-19 superspreading event in Boston may have led to 20,000 cases, researcher says – CNN

(CNN)One superspreading event may be connected to about 20,000 Covid-19 cases in the Boston area, a researcher said on Tuesday.
That event, a biotech conference attended by 200 people in late Februa…
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