Effectiveness of the pre-Omicron COVID-19 vaccines against Omicron in reducing infection, hospitalization, severity, and mortality compared to Delta and other variants: A systematic review
Human Vaccines & Immunotherapeutics | March 14, 2023 | Volume: 19 | Issue: 1 | Pages: No page available
10.1080/21645515.2023.2167410
| PMID 36915960