U.S. CDC says it's ready for seasonal booster shots if necess… stocking 0 24 2021.05.09 13:19 https://youtu.be/NfWr6e1Gpng + 12 美CDC, 백신 효력약화•변이 대비한 부스터샷 필요성 검토 In the United States, the CDC is investigating the possible need for COVID-19 booster shots on a ...