Here's Why Biden Still Wears A Face Mask Despite Being Fully Vaccinated KEY POINTS The president wore a covering as he gave speeches the past week New guidelines say people fully vaccinated people do not have to wear a mask outdoors One of President Joe Biden’s top White House advisers on Sunday revealed why the POTUS still wears a face mask outdoors despite the latest guidance that says he doesn't have to. Senior adviser Anita Dunn appeared on CNN’s “State of the Union” where she said the president, who is fully vaccinated for COVID-19, still wears a mask outdoors out of habit and as an extra precaution.