정은경 "60대 이상 백신 한번만 맞아도, 사망예방 100%"...2021.05.13

https://archive.ph/8eRKu

https://www.joongang.co.kr/article/24056756

https://news.naver.com/main/read.naver?mode=LSD&mid=sec&sid1=102&oid=025&aid=0003101409

https://news.naver.com/main/read.naver?mode=LSD&mid=sec&sid1=102&oid=022&aid=0003644039

https://www.korea.kr/special/policyFocusView.do?newsId=148896334&pkgId=49500742

http://www.segye.com/newsView/20211202514885?OutUrl=naver