Pfizer announces COVID-19 vaccine is 100% effective in teens aged 12-1… stocking 0 64 2021.11.23 15:09 https://youtu.be/pkpXeqzQlIc + 13 화이자 코로나 백신 "12-15세 접종면역 효과 4개월 후도 100%" Pfizer has announced that its COVID-19 vaccine shows 100-percent efficacy in adolescents.