USA Today： The first 22M Americans have been vaccinated for COVID-19, and initial safety data shows everything is going well, CDC says
Webmd： CDC Panel: No COVID-19 Vaccine Safety Surprises
想看中文视频+ppt的：
USA Today：
The first 22M Americans have been vaccinated for COVID-19, and initial safety data shows everything is going well, CDC says
Webmd：
CDC Panel: No COVID-19 Vaccine Safety Surprises
想看中文视频+ppt的：