本帖最后由 zhousht 于 2021-8-6 17:26 编辑 ' ]: i7 H% z7 Y% [1 x* [! Z
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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 M4 m/ m2 ?/ J/ B https://www.theguardian.com/soci ... -system-experts-say ; n* j0 Y- `8 r) Y: YLockdown最受害的是儿童。