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Outbreak of SARS-CoV-2 B.1.617.2...
This report describes an outbreak with the Delta variant in a federal Texas prison among unvaccinated and vaccinated persons.

1.74%(129/185)打疫苗的感染,93%(39/42)没打疫苗的感染
2. 感染过又接种了疫苗,只有5%感染,感染过没有打疫苗,有 57%感染
3.两针接种4-6月后感染达到89%,基本跟没有打疫苗差不多
4.疫苗防重症和死亡
5.疫苗不能减少感染时间,大概也不能防止传染给别人(the median interval between symptom onset and last positive reverse transcription–polymerase chain reaction (RT-PCR) test result in fully vaccinated versus unvaccinated persons was similar (9 versus 11 days, p = 0.37).)
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