511项研究表明，COVID-19、RSV 和流感疫苗对所有年龄段的人都是安全有效的。

哦。

511 studies showed that COVID-19, RSV, and influenza vaccines are safe and effective in people of all ages.

Oh.

4551+ 项研究表明，COVID 疫苗既不安全也不有效。

4551+ studies show the COVID shots are not safe and not effective.