流感疫苗一直说预测不准,2009美国还补打H1N1.新冠病毒变异,疫苗失效正常.

来源: 5181 于 2022-01-12 19:49:42 [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.