本帖最后由 zhousht 于 2021-8-6 17:26 编辑 9 b" I' j1 @* t+ s8 j4 t
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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.( S$ `- i+ F' F: f* b$ N https://www.theguardian.com/soci ... -system-experts-say " K2 b9 q6 R, O; wLockdown最受害的是儿童。