本帖最后由 zhousht 于 2021-8-6 17:26 编辑 0 K- T3 J/ o7 F1 p+ h% C( i S0 y; c! E; `. m
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.& I* j: T# j0 `( E8 E8 E4 ^/ a2 _ https://www.theguardian.com/soci ... -system-experts-say % q$ W8 p# e/ o; VLockdown最受害的是儿童。