Hellow guys, Welcome to my website, and you are watching "中和性抗體"是什麼? 疫苗效力重要指標. and this vIdeo is uploaded by 台視新聞 TTV NEWS at 2021-08-02T08:06:15-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.