Effectiveness of Vaccination and Previous Infection Against Omicron Infection and Severe Outcomes in Children Under 12 Years of Age https://www.medrxiv.org/content/10.1101/2023.01.18.23284739
Effectiveness of Vaccination and Previous Infection Against Omicron Infection and Severe Outcomes in Children Under 12 Years of Age https://www.medrxiv.org/content/10.1101/2023.01.18.23284739