当然是现有疫苗对新冠疫情的作用。说不定那天一个新疫苗冒出来非常有效。

来源: solo1 于 2021-05-05 06:01:08 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.