检测不足从检测阳性率中也可以看出。去年5月的美国阳性率超过20%

来源: oueeii 于 2021-06-24 17:16:06 [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.