Lottery-based incentives do not increase COVID-19 vaccination rates: JAMA

Using data from the U.S. Centers of Disease Control to evaluate trends in vaccination rates among adults 18 and older, the researchers compared vaccination rates before and after the Ohio lottery versus other states in the U.S. that did not yet have vaccine incentive lottery programs. Vaccination rates in other states served as a "control" for vaccination trends measured in Ohio, allowing the researchers to account for factors besides the Ohio lottery (such expanding vaccine eligibility to adolescents) throughout the country.

"Our results suggest that state-based lotteries are of limited value in increasing vaccine uptake. Therefore, the resources devoted to vaccine lotteries may be more successfully invested in programs that target underlying reasons for vaccine hesitancy and low vaccine uptake," said Walkey, a physician at Boston Medical Center.

The researchers believe identifying interventions that can successfully increase COVID-19 vaccination rates is a critical public health issue necessary to curb the pandemic. "It is important to rigorously evaluate strategies designed to increase vaccine uptake, rapidly deploy successful strategies, and phase out those that do not work," Walkey said.

Although Walkey and his colleagues were sorry to see that state lottery incentives were not associated with an increase COVID-19 vaccinations, they hope their findings will lead to a shift in focus away from ineffective and expensive lotteries, and on to further study of other programs that may more successfully increase vaccine uptake.