• LIVE UPDATES Increasing data suggests UK variant may be deadlier, says CDC director
• US death toll could reach 530,000 this month
원문출처 : https://www.cnn.com/2021/02/04/health/vaccines-mix-study-coronavirus-gbr-intl/index.html
원문출처 : https://www.cnn.com/2021/02/04/health/vaccines-mix-study-coronavirus-gbr-intl/index.html