8 R" C/ r L4 Z- ~5 v1 ?# I2 k" ?7 ^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. , n+ i: L) A" `2 I# |( N: ]- nhttps://www.theguardian.com/soci ... -system-experts-say8 E2 B2 V6 p. n6 ?- `' P
Lockdown最受害的是儿童。