ohio州长是republican吧，是不是说谎造假，希望是，要不然真看不到头 Ohio has a new record today: 2,039 new coronavirus cases. That's the second record in less than a week, after Friday's 1,840 cases. Before that, it was July 30, when there were 1,733. Why? Unlike earlier and smaller case increases in the summer, hospitalizations are spiking this time, indicating this is not simply a case of testing more people. The hospitalization bed count of 1,042 today is up 26% from last Wednesday's total of 828 and up 85% from a recent low of 563 on Sept. 20. The record of 1,122 was set on July 28. Gov. Mike DeWine says COVID-19 is spreading through gatherings with family and friends.
还有这个，疫苗有用吗 U.S. researchers have confirmed a case of COVID-19 reinfection, the first in North America and the fifth in the world. A 25-year-old Nevada man tested positive for COVID-19 in April and again in June, separated by two negative tests. The man was infected with two different strains of the coronavirus, and the second bout of COVID-19 was worse than the first, requiring hospitalization and assistance in breathing. Why? Researchers don't know, but speculate he may have picked up a higher dose or more virulent version, or maybe that the presence of antibodies in his bloodstream made the second infection worse.
有的人可能就是感染了没产生抗体啊。昨天我发过一个帖子，荷兰发现一个二次感染死亡的，二次感染以后查抗体是阴性。
欧洲冷的早 日照短 现在很明显
那个89岁的老人，而且好像还有癌症？
天冷了抵抗力下降又是什么理论？
另外，传染性增强与毒性变弱不矛盾。
我理解说病毒会变弱还是变得更容易传染，实际上是自然选择的结果
假设病毒有两个突变，同样传染能力的两个病毒变异，肯定是致死率高的那个传染的少，道理很简单，致死率高，病人可以在外面活动传染别人的时间短；假如感染过致死率低的病毒以后，对这类病毒都有抗体了，那么多代以后肯定致死率高的变异变少