Heterologous versus homologous COVID-19 booster vaccination in previous recipients of two doses of CoronaVac COVID-19 vaccine in Brazil (RHH-001): a phase 4, non-inferiority, single blind, randomised study.
Lancet. 2022 Feb 5;399(10324):521-529. doi: 10.1016/S0140-6736(22)00094-0. Epub 2022 Jan 21.
Lancet. 2022.
PMID: 35074136
Free PMC article.
Clinical Trial.