Effectiveness of the CoronaVac vaccine in older adults during a gamma variant associated epidemic of covid-19 in Brazil: test negative case-control study

Ranzani, Otavio; D. T. Hitchings, Matt; Dorión, Murilo; Lang D’Agostini, Tatiana; Cardoso de Paula, Regiane; Ferreira Pereira de Paula, Olivia; Faria de Moura Villela, Edlaine; Torres, Mario; Barbosa de Oliveira, Silvano; L. Schulz, Wade; Almirón, María; Fabiano do Carmo Said, Rodrigo; Dias de Oliveira, Roberto; Vieira da Silva, Patrícia; Navegantes de Araújo, Wildo; Carlo Gorinchteyn, Jean; R. Andrews, Jason; A. T. Cummings, Derek; I. Ko, Albert; Croda, Júlio

doi:10.1136/bmj.n2015

Public

Effectiveness of the CoronaVac vaccine in older adults during a gamma variant associated epidemic of covid-19 in Brazil: test negative case-control study

Published in BMJ • Aug 20, 2021

Authors:

Otavio Ranzani

Matt D. T. Hitchings

Murilo Dorión

Abstract

OBJECTIVE: To estimate the effectiveness of the inactivated whole virus vaccine, CoronaVac (Sinovac Biotech), against symptomatic covid-19 in the elderly population of São Paulo state, Brazil during widespread circulation of the gamma variant. DESIGN: Test negative case-control study. SETTING: Commu...

Subject

Medicine

Vaccination

Confidence interval

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