Quasi-experimental evaluation of a financial incentive for first-dose COVID-19 vaccination among adults aged ≥60 years in South Africa by Brendan Maughan-Brown, Candy Day, Harsha Thirumurthy, Lawrence Long, Alison M Buttenheim, Sophie J S Pascoe, Candice Maylene Chetty-Makkan, Elizabeth F Bair, Simamkele Bokolo, Korstiaan Wapenaar, Jesse Werner, Jacqui Miot

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