本帖最后由 zhousht 于 2021-8-6 17:26 编辑 + @4 o M5 H# Q# D# p; y) O) I* Y# i2 b% H
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.- x( y! F6 Y& H* i7 }8 { https://www.theguardian.com/soci ... -system-experts-say " W8 T4 J$ r1 t% r, _3 u0 W+ H _Lockdown最受害的是儿童。