A global analysis of COVID-19 infection fatality rate and its associated factors during the Delta and Omicron variant periods: an ecological study

por Thi Hong Nguyen, Nhi, Ou, Tsong-Yih, Huy, Le Duc, Shih, Chung-Liang, Chang, Yao-Mao, Phan, Thanh-Phuc, Huang, Chung-Chien
Publicado 2023