& I; [$ z: }/ G& |# m' H; WScientists 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- k! O3 x4 p/ G https://www.theguardian.com/soci ... -system-experts-say1 P6 E0 E: \) b9 [9 j
Lockdown最受害的是儿童。