本帖最后由 zhousht 于 2021-8-6 17:26 编辑 }/ h! F; r( x7 B; @* _& O8 R 0 c5 q* W) ]' q$ A) r. d- HScientists 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. # H/ y# N4 l) h3 C5 chttps://www.theguardian.com/soci ... -system-experts-say 5 i9 @* t$ o, s# {: u* `Lockdown最受害的是儿童。