美연구진 "화이자·모더나, 예방효과 몇년 지속될수도" / 연합뉴스tv (yonhapnewstv)

2022 0:44
Synopsis
美연구진 "화이자·모더나, 예방효과 몇년 지속될수도" mRNA 계열의 코로나19 백신을 맞으면 예방 효과가 몇 년간 지속될 가능성이 ...
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