本帖最后由 zhousht 于 2021-8-6 17:26 编辑 # {$ }. u# S7 H, x7 m- u$ z ; D: L4 D3 Q" G2 G; k' A: uScientists 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. % j6 H. K; w6 t3 n0 Z: S# o, H! Whttps://www.theguardian.com/soci ... -system-experts-say . J7 K4 K- A6 K( ^# TLockdown最受害的是儿童。