@Liberalism2021 @paulalexlewis @DonaldWelsh16 @ironandwine11 Flu vaccine is once a year, many take it every single year, some people supposedly take it twice in a year. Have been used for decades and not harmful, but not all that effective either.
@Liberalism2021 @paulalexlewis @DonaldWelsh16 @ironandwine11 流感疫苗每年接种一次,很多人每年接种一次,有些人据说一年接种两次。已经使用了几十年并且无害,但也不是那么有效。