本帖最后由 zhousht 于 2021-8-6 17:26 编辑 $ A& n& E6 D8 }
* I+ t* g# ]& T3 V
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., k+ J/ U l9 ^+ i3 q P https://www.theguardian.com/soci ... -system-experts-say . c6 f8 X: D' j# ?Lockdown最受害的是儿童。