楼主你自己给出的cdc链接中说了2019-2020流感季节的测试样本中Atype中有91%是H1N1,H1N1病毒对65岁以上的老年人的感染率、住院率和死亡率本来就是比其它流感病毒低得多。
[url=https://www.cdc.gov/flu/weekly/#S2]https://www.cdc.gov/flu/weekly/#S2[/url]
[url=https://leicester.figshare.com/articles/Clinical_aspects_of_pandemic_2009_influenza_a_H1N1_virus_infection/10110191]https://leicester.figshare.com/articles/Clinical_aspects_of_pandemic_2009_influenza_a_H1N1_virus_infection/10110191[/url]
![](https://archived-imgs.huaren.us/jpeg,q20/upload/2020/02/24/71724128107918.jpeg)
![](https://archived-imgs.huaren.us/jpeg,q20/upload/2020/02/24/71724135911038.jpeg)
[url=https://www.cdc.gov/flu/weekly/#S2]https://www.cdc.gov/flu/weekly/#S2[/url]
[url=https://leicester.figshare.com/articles/Clinical_aspects_of_pandemic_2009_influenza_a_H1N1_virus_infection/10110191]https://leicester.figshare.com/articles/Clinical_aspects_of_pandemic_2009_influenza_a_H1N1_virus_infection/10110191[/url]
![](https://archived-imgs.huaren.us/jpeg,q20/upload/2020/02/24/71724128107918.jpeg)
![](https://archived-imgs.huaren.us/jpeg,q20/upload/2020/02/24/71724135911038.jpeg)