https://blog.wongcw.com/2020/08/08/%e7%be%8efda%e9%87%8d%e7%94%b3%e6%96%b0%e5%86%a0%e7%96%ab%e8%8b%97%e5%af%a9%e6%89%b9%e4%b8%8d%e6%9c%83%e8%b7%b3%e6%ad%a5%e9%a9%9f-%e6%9c%89%e6%95%88%e7%8e%8750%e6%98%af%e5%ba%95/
美FDA重申新冠疫苗審批不會“跳步驟” 有效率50%是底線