Overall effectiveness of coronavirus vaccines has not dropped much yet for most vaccinated Americans, US Centers for Disease Control and Prevention vaccine advisers were told Monday.
원문출처 : https://www.cnn.com/2021/08/30/health/booster-shots-acip-discussion/index.html
원문출처 : https://www.cnn.com/2021/08/30/health/booster-shots-acip-discussion/index.html