Comparative effectiveness of 3 or 4 doses of mRNA and inactivated whole-virus vaccines against COVID-19 infection, hospitalization and severe outcomes among elderly in Singapore

• Celine Y. Tan,
• Calvin J. Chiew,
• Vernon J. Lee,
• Benjamin Ong,
• David Chien Lye,
• Kelvin Bryan Tan

Affiliations

Celine Y. Tan

Ministry of Health, Singapore; Corresponding author. Communicable Diseases Division, Ministry of Health, 12 College Road, Singapore 169852.

Calvin J. Chiew

Ministry of Health, Singapore; National Centre for Infectious Diseases, Singapore

Vernon J. Lee

Ministry of Health, Singapore; Saw Swee Hock School of Public Health, National University of Singapore, Singapore

Benjamin Ong

Ministry of Health, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore

David Chien Lye

National Centre for Infectious Diseases, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore; Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore

Kelvin Bryan Tan

Ministry of Health, Singapore; Saw Swee Hock School of Public Health, National University of Singapore, Singapore