Are there valid medical exemptions from wearing masks?

ABC News’ Devin Dwyer separates fact from fiction on whether there are legitimate medical reasons to not wear a mask in public during the pandemic. ABC News Live Prime, Weekdays at 7EST & 9EST WATCH the ABC News Live Stream Here: www.youtube.com/watch?v=w_Ma8oQLmSM SUBSCRIBE to ABC NEWS: bit.ly/2vZb6yP Watch More on abcnews.go.com/ LIKE ABC News on FACEBOOK www.facebook.com/abcnews FOLLOW ABC News on TWITTER: twitter.com/abc

Watch the video at ABC News on Coronavirus COVID-19