Wenya Yu

Aug 15, 2023 | mdpi.com | Wenya Yu |Zhichao Guo |Panpan Li |Jiahe Tian

1. IntroductionThe global coronavirus disease 2019 (COVID-19) pandemic has caused significant social, economic, and medical threats to all people. By 22 December 2022, there were 650,879,143 confirmed cases and 6,651,415 deaths globally [1]. To mitigate the transmission of COVID-19, lockdown regulations were instituted in most countries [2,3], including China. The national lockdown in China was implemented only during the first outbreak peak in Wuhan, in December 2019.