The vaccine is still highly effective in people six months after their second dose. Yet there is some evidence its efficacy might diminish over longer periods, and the shot isn’t as effective againstt he Delta variant, prompting research into adding a third dose
Pfizer, BioNTech Seek FDA Clearance for Covid-19 Booster
Early-stage study shows third dose of vaccine offers a higher level of protection, companies say
The
免责声明:上述内容仅代表发帖人个人观点,不构成本平台的任何投资建议。
6
举报
登录后可参与评论
暂无评论