5月 21, 20205月 22, 2020 @jenreport 民调显示很多美国人对接种新冠疫苗持谨慎态度 Poll finds many Americans wary of taking coronavirus vaccine
5月 18, 20206月 8, 2020 @jenreport 好消息!美国生物技术公司莫代尔纳称Covid-19疫苗初见成效 Moderna Says Initial Covid-19 Vaccine Results Are Positive