Moderna, Pfizer Covid-19 Vaccines and the New Tech Behind Them

P.M. Edition for Nov. 16. Drugmaker Moderna is the second drugmaker to report success with a Covid-19 vaccine that uses a new, gene-based technology known as messenger RNA. It's part of the reason they've been so fast in developing and testing the vaccines. If they work, the applications of mRNA could go beyond the pandemic. WSJ pharmaceutical reporter Peter Loftus discusses how the technology works. Annmarie Fertoli hosts. Learn more about your ad choices. Visit megaphone.fm/adchoices