Biden: 'Be a patriot', wear a mask

"Every single American should be wearing a mask when they're outside for the next three months, at a minimum. Every governor should mandate mandatory mask wearing. The estimate by the experts are it will save over 40,000 lives."

Biden's VP pick, Senator Kamala Harris, then stepped up to the microphone and said "that's what real leadership looks like."

According to Reuters data from Thursday, there are some 5,216,342 coronavirus cases and 166,063 fatalities from COVID-19.