本帖最后由 zhousht 于 2021-8-6 17:26 编辑 : S5 l; R9 t) z$ d' r 1 c/ v/ q1 T) x) j! `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.* t* b) u' g6 [5 w, P& q! w& V https://www.theguardian.com/soci ... -system-experts-say , P8 s2 X* [7 VLockdown最受害的是儿童。