Impact of incentives on COVID-19 vaccination; A systematic review.

Front Med (Lausanne) · 2022 · PMC9492889 · PMID 36160125

Europe PMC DOI

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marginally significantno p-value reported

Moreover, while Vax-a-million significantly increases the uptake of the COVID-19 vaccine, the effects of other lotteries and persuasive messages were non-significant or marginally significant.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.