The Tech Behind the Leading Covid-19 Vaccine Candidates

As coronavirus case counts continue to surge in the U.S., all eyes are on two promising vaccine candidates from drug companies Pfizer and Moderna. Both use a promising new gene-based technology called messenger RNA. Reporter Peter Loftus joins host Amanda Lewellyn for a look at how it works. Christopher Zinsli is our supervising producer. Kateri Jochum is the executive producer of WSJ Podcasts. Learn more about your ad choices. Visit megaphone.fm/adchoices