打第4針輝瑞Covid Vaccine有用嗎,有風險嗎?

來源: 於 2022-07-13 20:03:34 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

I want to travel to Europe for vacation. I am thinking about getting my 4th Covid vaccine taken. Does it help? Is it safe to take it. I had bad reaction to it  when taking the 3rd dose.