Munro, A. et al., Immunogenicity and Reactogenicity of BNT162b2 and mRNA1273 COVID-19 Vaccines Given as Fourth Dose Boosters in the COV-BOOST Randomised Trial Following Two Doses of ChAdOx1 nCov-19 or BNT162b2 and a Third Dose of BNT162b2. Preprint at SSRN: https://ssrn.com/abstract=4076824
Hause, Anne M et al. “Safety Monitoring of COVID-19 Vaccine Booster Doses Among Adults - United States, September 22, 2021-February 6, 2022.” MMWR. Morbidity and mortality weekly report vol. 71,7 249-254. 18 Feb. 2022, doi:10.15585/mmwr.mm7107e1 www.cdc.gov/mmwr/volumes/71/wr/mm7107e1.htm