Dr. Larry Brilliant: Wear masks, hats and gloves

On GZERO World with Ian Bremmer, legendary epidemiologist Dr. Larry Brilliant challenges the mixed messages on masks coming from the US government. He tells Ian that masks, and even the addition of hats, gloves, and glasses, are essential to stopping the spread of COVID-19 until there is a vaccine.

Dr. Brilliant recounts a story from 1918, after a deadly wave of flu had claimed millions of lives. In celebration, leaders of San Francisco threw a party where revelers removed their masks. Months later, the virus was back and deadlier than before.