本帖最后由 zhousht 于 2021-8-6 17:26 编辑 . L" d1 B* \8 i4 D 9 O9 d' L8 ?% ]" D( OScientists are concerned that measures to combat Covid-19 have weakened the immune systems of young children who have not been able to build up resistance to common bugs, leaving them vulnerable when mask-wearing and social distancing eventually end. 4 B1 v. U6 E: K8 J; a0 x9 nhttps://www.theguardian.com/soci ... -system-experts-say : T* W, b2 E- R9 MLockdown最受害的是儿童。