WHO说没证据证明健康儿童和青少年需要第三针；柳叶刀上最新发表的研究显示mRNA加强针阻挡不了感染omicron

WHO says there’s no evidence healthy children and adolescents need Covid boosters. 这是辉瑞钱没给够？
https://www.cnbc.com/2022/01/18/who-says-theres-no-evidence-healthy-children-adolescents-need-covid-boosters.html
Breakthrough infections with SARS-CoV-2 omicron despite mRNA vaccine booster dose

In-vitro data suggest lower titres of neutralising antibodies against omicron compared to other SARS-CoV-2 lineages following BNT162b2 vaccination but increased titres after a third dose,10,  11,  12 supporting calls for booster doses while the omicron variant appears to be spreading globally. Our study, however, demonstrates insufficient prevention of symptomatic infection in otherwise healthy individuals who had received three doses of COVID-19 mRNA vaccines.
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(22)00090-3/fulltext#sec1
https://www.bloombergquint.com/coronavirus-outbreak/mrna-boosters-don-t-block-omicron-south-african-study-shows