Boston biotech conference led to 245,000 Covid-19 cases across US, genetic fingerprinting shows

Annotation by Deane Barker • •
https://www.cnn.com/2020/12/11/health/superspreader-covid-boston-biotech-conference/index.html
Narrative

Researchers have tracked almost a quarter-million cases of COVID back to a single conference in February 2020 which was attended by 200 people.

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