V*******n
发帖数: 1 | 1 The second worry, called “original antigenic sin,” seems more plausible.
In this view, the immune system’s response is tailored to the first version
of the virus, and its responses to subsequent variants are much less
powerful.
With more than 50 mutations, Omicron is different enough from previous
variants that antibodies made for the original version of the virus struggle
to recognize the latest version.
“We have enough clues that it could be a problem,” said Dr. Amy Sherman, a
vaccinologist at Harvard University. “We’ve certainly seen evolution in a
short period of time.”
The speedy evolution of the virus occurs in large part because it has access
to huge numbers of human hosts. If cases continue to accumulate at the
current rate, or something close to it, the virus may continue to amass
major changes — meaning the vaccines might need to be regularly updated.
http://www.nytimes.com/2022/01/06/health/covid-vaccines-boosters.html | V*******n
发帖数: 1 | | J*****3
发帖数: 25 | | a***k
发帖数: 1038 | 4 mRNA疫苗吹嘘说容易快速针对变种改变本来就是彻头彻尾的谎言，真的有傻子信了？一
开始大家都知道新的免疫逃逸变种只需要一个突变，比如E484K就够了，因为抗原原罪
，改一个突变的新疫苗根本不会产生针对新变异的新抗体。按教科书上的例子，再来几
百个突变人体都不大会产生新抗体。
摩德纳的老总今天说要打第四针，基本上就是明说针对omicron的疫苗完全失败，还不
如老疫苗打第四次。
【在 V*******n 的大作中提到】
: 看来加强针出问题已经是业内共识了，伟哥药丸。
| V*******n
发帖数: 1 | 5 就算掉头快也是要花钱的，有福气这种代言人在白宫当顾问，当然要把旧疫苗卖到实在
混不下去饿了再改。 | a***k
发帖数: 1038 | 6 你引的那篇文章还在骗人。疫苗本身可以调头，但是已经被扎针的人永远调不过来了，
无论疫苗如何变，抗体还是针对老毒株的。
【在 V*******n 的大作中提到】
: 就算掉头快也是要花钱的，有福气这种代言人在白宫当顾问，当然要把旧疫苗卖到实在
: 混不下去饿了再改。
| m***n
发帖数: 12188 | | V*******n
发帖数: 1 | | f****a
发帖数: 1880 | 9 美帝好日无边
坐等看戏
【在 V*******n 的大作中提到】
: 芭比Q了
|
|
