LULU GARCIA-NAVARRO, HOST: When Ohio's COVID-19 vaccination rate was plateauing, state officials realized they needed a new incentive. Enter Vax-a-Million. Ohio Public Radio's Andy Chow has more. ANDY CHOW, BYLINE: Ohio's new weekly lottery broadcast had all the flash of the typical Wednesday night drawing, where they usually announce the winning numbers of the Mega Millions or Powerball jackpot. (SOUNDBITE OF ARCHIVED RECORDING) UNIDENTIFIED PERSON: Good evening, and welcome to the Vax-a-Million Giveaway where we will... CHOW: But this time, instead of buying a lotto ticket, you only need a ...