Apparently, the mass marketing of millions of face masks -- none of whose owners ended up suing the manufacturer for injury -- did nothing to assuage her fear.
When I was in fifth grade or so, at the same time my mom was working at Di'Iorio's variety store in the Park 'N Shop shopping center, I was allowed to incorporate masks into my costumes. But not until after she'd taken scissors to them and enlarged the eye, nostril and mouth openings.
To this day, I choose mask-free costumes. Go figure.