Support WBURWhat It Was Like To Participate In The Clinical Trial For Moderna's COVID-19 VaccinePlay04:07Download AudioChristianna SilvaMary Louise KellyNovember 20, 2020 ShareAn illustration picture shows vials with COVID-19 vaccine stickers attached and syringes with the logo of U.S. biotechnology company Moderna on November 17. (AFP via Getty Images)