ER doctor provides guidance on coronavirus drug trials and vaccine development

04:45

Dr. Mario Ramirez, an emergency room physician treating COVID-19 patients, joins Andrea Mitchell to discuss what Dr. Fauci calls "good news" from a coronavirus drug treatment trial, and the outlook for the development of a coronavirus vaccine. Ramirez also served as a pandemic and emerging threats coordinator at the Dept. of Health and Human Services during the Obama administration.