本帖最后由 zhousht 于 2021-8-6 17:26 编辑 2 N( i0 b$ U3 S+ I( X
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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.' W% l. f |( Z+ ]6 v% k* j7 v https://www.theguardian.com/soci ... -system-experts-say ) ^( \+ D- m( {1 tLockdown最受害的是儿童。