本帖最后由 zhousht 于 2021-8-6 17:26 编辑 9 v2 q, i t" |, Q4 Y3 ~1 y$ i I$ q; O- [) g6 |8 h. d
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 R7 B' m8 A0 v& y* g3 p https://www.theguardian.com/soci ... -system-experts-say 9 M$ B$ f5 l- \# YLockdown最受害的是儿童。