Out-of-pocket costs have been removed for COVID-19 vaccinations thanks to the CARES Act. However, vaccines that require more than one dose, like the COVID-19 vaccine, create additional behavioral and environmental challenges that can prevent completion of the vaccination series. In a recent IHPI feature, V-BID Center Director Mark Fendrick shares how policymakers, providers, and employers can encourage and incentivize receipt of the second COVID-19 vaccine dose.