本帖最后由 zhousht 于 2021-8-6 17:26 编辑 7 k9 @) N7 ]3 o- H
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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., K9 _* U2 ^+ U% J4 R8 i https://www.theguardian.com/soci ... -system-experts-say * F h# A; j, s3 a5 |Lockdown最受害的是儿童。