本帖最后由 zhousht 于 2021-8-6 17:26 编辑 7 n# @% `2 A2 l* x% ^3 W) u! }9 n L; O! A, O
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.( }0 _* ]% Z: t! Y6 g https://www.theguardian.com/soci ... -system-experts-say 5 p7 A& X, h, M7 |" dLockdown最受害的是儿童。