香港大学临床医学院刘宇隆团队于预印本平台Research Square发布题为《BNT162b2和克尔来福®在香港奥密克戎变异株BA.2亚型流行期间对抗儿童和青少年SARS-CoV-2感染的有效性》(Effectiveness of BNT162b2 and CoronaVac in children and adolescents against SARS-CoV-2 infection during Omicron BA.2 wave in Hong Kong)的论文,结果表明接种2剂或3剂由SINOVAC科兴研制的新冠病毒灭活疫苗克尔来福®对奥密克戎变异株BA.2亚型毒株所致感染具有保护效果,且接种第三针后保护效果大幅提升。(疫苗之益)