本帖最后由 zhousht 于 2021-8-6 17:26 编辑 5 E9 X% u$ d7 G; J
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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. - C' x( X6 ^0 z; V# [https://www.theguardian.com/soci ... -system-experts-say 5 y$ W! |) k' I; s4 L% cLockdown最受害的是儿童。