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

• Main Authors: Nhi Thi Hong Nguyen (Author), Tsong-Yih Ou (Author), Le Duc Huy (Author), Chung-Liang Shih (Author), Yao-Mao Chang (Author), Thanh-Phuc Phan (Author), Chung-Chien Huang (Author)
• Format: Book
• Published: Frontiers Media S.A., 2023-06-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

BackgroundThe Omicron variant of SARS-CoV-2 is more highly infectious and transmissible than prior variants of concern. It was unclear which factors might have contributed to the alteration of COVID-19 cases and deaths during the Delta and Omicron variant periods. This study aimed to compare the COV...