A biotech conference in Boston last February that's already been flagged as a Covid-19 superspreading event led to at least 333,000 other cases across the US and Europe, a new genetic fingerprinting study shows.
원문출처 : https://www.cnn.com/2020/12/11/health/superspreader-covid-boston-biotech-conference/index.html
원문출처 : https://www.cnn.com/2020/12/11/health/superspreader-covid-boston-biotech-conference/index.html