@pickettjessica @walidgellad How does it reduce the risk when mass infecting kids under 5 or the great majority of older kids who aren't vaccinated?
@pickettjessica@walidgellad当大规模感染5岁以下儿童或绝大多数未接种疫苗的年长儿童时，它如何降低风险？
@pickettjessica @walidgellad How does it reduce the risk when mass infecting kids under 5 or the great majority of older kids who aren't vaccinated?
@pickettjessica@walidgellad当大规模感染5岁以下儿童或绝大多数未接种疫苗的年长儿童时，它如何降低风险？