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국제Pfizer
[국제]Pfizer and Modena “Vaccine effectiveness unclear in South African mutation”
![[국제]Pfizer and Modena “Vaccine effectiveness unclear in South African mutation”](https://image.ytn.co.kr/general/jpg/2021/0218/202102181811355415_t.jpg "[국제]Pfizer and Modena “Vaccine effectiveness unclear in South African mutation”")