本帖最后由 zhousht 于 2021-8-6 17:26 编辑 0 [$ p9 G* }+ f
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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. # s8 c& h( y& I: phttps://www.theguardian.com/soci ... -system-experts-say . ` _! |# E8 R) tLockdown最受害的是儿童。