好消息， 以往感染过新冠病毒的，再打过两针MRNA疫苗后，对巴西，英国和南非变种免疫力极强

https://www.cnbc.com/2021/05/05/fauci-says-studies-show-people-whove-had-covid-and-get-vaccinated-may-have-more-protection-against-variants.html

https://news.yahoo.com/dr-fauci-explains-why-covid-193759940.html

previously infected people who got vaccinated were exceptionally well protected against three of the five major variants of concern: the P1 variant, first identified in Brazil, the B.1.1.7 variant from the UK which is now dominant in the US, and the B.1.351 variant, first found in South Africa.