For Biden, wearing a mask — and attempting to persuade others to wear one, too — became one of the guiding principles of his presidential campaign and of the early months of his presidency. During the campaign, as he sat alone in the basement of his home, he would wear a medical mask for local television interviews. When he emerged for one of his first public appearances almost a year ago, on Memorial Day, he wore a specially ordered black cloth mask.
‘Better days are ahead’: Maskless Biden marks milestone in virus battle
