CDC抽样调查发现17岁以下组已经感染过新冠的最多，已经高达75% dudaan2022-04-30 03:13:35

Now overall between December 2021 and February 2022 thorough seroprevalence, in other words, the presence of antibodies to the virus in the bloodstream increased across all US age groups from 34% in December 2021 to 58% in February 2022.

Dr. Kristie Clarke:

Again, this study was only looking at the presence of antibodies from prior infection and did not detect antibodies from prior vaccination, whether it be primary series or boosting. The largest increases were observed, as I mentioned, among children and teens, those 17 and younger of whom by February 2022, roughly 75% or 3 in 4 had developed antibodies due to prior infection.

Maderna 要在蒙特利尔建厂了 ，和政府合作，年产100M 剂量。到时候会有新病毒的

好事儿。感谢O变，让我们破除了过去两年中新冠带来的恐惧，能够以平和的心态面对生活、迎接未来

感染获得的抗体的保护率有多少？有没有这个数据？

新冠疫苗break thru rate太高了

我们从小打的别的疫苗，如果周围也有阳性病例的话，也会有很多break thru吗？

这问题好，还有能管多久，不会要4个月感染一次吧？

当然有啊，打过卡介菌还得结核病的比比皆是啊。按规定，50%以上有效，就可以批准使用了。过去大多数疫苗有效率在70%以下。

这已经没有实际意义，现在的变种如微风：鸟悄儿地来，蔫儿巴地去，回头再撩你，你还能咋地。

自我观察，感觉还是蛮重的，比12月份的毒力大，病毒又侵支气管了，化火非常容易。