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 studySue Ann Costa Clemens, Laiana Januse de Arruda Cordeiro Matos, Ralf Clemens et al.|The Lancet|2022Cited by 467