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漂亮宝贝
发表于 2021-5-16 09:03:58
https://en.wikipedia.org/wiki/BCG_vaccine
Rates of protection against tuberculosis infection vary widely and protection lasts up to twenty years.[1] Among children it prevents about 20% from getting infected and among those who do get infected it protects half from developing disease.[3] The vaccine is given by injection into the skin.[1] Additional doses are not supported by evidence.[1] It may also be used in the treatment of some types of bladder cancers.[4]
这个疫苗至多也就是给一个群体维护性。偶然去中国真是没须要打。除非中国亲属有正在病发的人。 |
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