本帖最后由 zhousht 于 2021-8-6 17:26 编辑 2 l. K7 O' v, \- ]6 Z6 N" t' Z8 L3 g! g! D6 a, H. W+ B+ g( y8 o, v
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.; S @/ C. y3 I, M https://www.theguardian.com/soci ... -system-experts-say : e9 O7 f/ w' z) n8 a( ILockdown最受害的是儿童。