驚！輝瑞疫苗vs南非變種病毒 效力恐減2/3

<img src="https://static.rti.org.tw/assets/thumbnails/2020/12/17/6d267320a3426cda83c0571211a6aaf8.jpg" width="360" alt="美國輝瑞大藥廠(Pfizer)研發的COVID-19疫苗。...