feng
2020-09-28T01:23:49+00:00
今年8月以来,美国50所大学中7万例新冠感染病例中,住院治疗的3人,死亡0人。
致死率下降,传染性上升?
[img]https://img.nga.178.com/attachments/mon_202010/07/-7Q5-abs6ZgT3cSkm-mr.jpg[/img]
致死率下降,传染性上升?
[img]https://img.nga.178.com/attachments/mon_202010/07/-7Q5-abs6ZgT3cSkm-mr.jpg[/img]