本帖最后由 zhousht 于 2021-8-6 17:26 编辑 ( l+ m% K& u, [/ v" v; o ! t7 `; U% ?% D* i; V& ~Scientists 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. ! F9 ?2 w6 m9 ?, Z* w0 P2 x: Z' thttps://www.theguardian.com/soci ... -system-experts-say % E9 f7 g( Q7 p/ G' f G- ULockdown最受害的是儿童。