本帖最后由 zhousht 于 2021-8-6 17:26 编辑 0 K2 A; j! R8 i. y+ E% ^- s# A/ b" B$ x* l) j. Y2 `3 U
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.1 E5 \% _3 c$ b: H/ G https://www.theguardian.com/soci ... -system-experts-say - G* p1 W. e: |* ]) m, lLockdown最受害的是儿童。