Drew Angerer/Getty Images The nation's top infectious disease expert Dr. Anthony Fauci said he wears a mask in public to make it a "symbol" of what the public "should be doing" amid the coronavirus pandemic. Fauci's comments come after President Donald Trump shared a tweet mocking former Vice President Joe Biden for wearing a face mask during a Memorial Day ceremony Monday. He acknowledged that masks are "not 100% effective" at preventing infection, but said it is also out of respect for one another. "It's sort of respect for another person and have that other person respect you," Fauci said.