COVID vaccine lotteries tied to increased uptake in most, not all, statesPrograms that reward the newly vaccinated with an entry in a lottery were associated with an increase in COVID-19 vaccinations in most—but not all—US states offering the incentive and may have spurred almost 2 million people to get immunized, according to research published yesterday in JAMA Network Open.From Mar 17 to Jul 5, 2021, researchers from Drexel University and the University of Georgia polled 403,714 adult participants in the Household Pulse Survey and analyzed daily vaccination rates for the 11 states with a vaccine lottery and 28 states without such a program.