本帖最后由 zhousht 于 2021-8-6 17:26 编辑 * q1 y }3 `' i9 x6 C / z4 n" A& {' e. w0 TScientists 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. 8 q9 @" D0 L: i- [& N; @8 u; z% F3 @https://www.theguardian.com/soci ... -system-experts-say F e B" l, K3 X; P) O: q- \' r2 [Lockdown最受害的是儿童。