本帖最后由 zhousht 于 2021-8-6 17:26 编辑 / q% q. h) b( X9 ?& \! m3 j6 B: p
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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. $ x3 V+ p, }, @3 ^https://www.theguardian.com/soci ... -system-experts-say 0 e- M1 h( ?( `" ?( wLockdown最受害的是儿童。