國內人口密度大，老中青少混居，老年和有基礎病的比例超過20%，反向隔離難度大

來源: 太空風於 2022-12-20 19:40:04 [舊帖] [給我悄悄話] 本文已被閱讀：次

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