(CNN) -- Nearly 66 million people in the United States who are eligible still have not gotten vaccinated against Covid-19, no matter how much danger that puts them in and no matter how many incentives or mandates have been thrown at them. States and public health officials have tried all sorts of novel ideas. They've offered donuts, beer and even cold hard cash to entice people to get the vaccine. At least one tactic, Lotteries, did not seem to do the trick, according to a new Study Published Friday. The study, published in JAMA Health Forum, looked at vaccination records...

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