In the 1970s, a helmeted rider was a rare sight. Only racers wore helmets. This persisted into the 1980s, fading gradually in the decade after that. Now they have become a normal sight in our culture.
After telling us for months that masks do little or nothing to prevent the spread of disease in the general population, the official position seems to be shifting in favor of masks. At the same time, masks are in short supply for the people who need them most, caring for the sick or for first responders attending to people who might be sick. We're told to improvise. This does open the field to fashion statements and home hobby projects.
One guy in Italy posted a video using a feminine sanitary pad. I don't know if there are any of those hiding in a cabinet around the house, but there may be some leftover tampons I can shove in my nostrils.
I did notice in the grocery store that the empty toilet paper shelves were right next to fully stocked displays of adult diapers. They could be used for really heavy breathing.
A breath helmet would seem to be a minor concern for a cyclist flying free in the open air, six feet or more from anyone else. When traffic thickens up, however, we end up close to the occupants of motor vehicles, who might have the window down, and fellow riders on crowded paths. Air movement should make any contagion highly unlikely in the moving environment of a road, street, or bike path. The slower the speed and the more calm the air, the greater the chance that a cloud may hang. Stopped adjacent to each other, people could exchange sneezes.
Judge the odds for yourself. With incidents of door handle licking and targeted coughing, cyclists might want to take extra precautions because we already suffer the bad jokes and outright malice of motorists who don't think we belong out there. In this area, business traffic has diminished, but with many people released from their workday schedules some of them have nothing better to do than drive around. I haven't launched my commute yet, but I'm hoping to do it soon. Training rides are part of that preparation, so even though I'm not in the workday riding groove I'm still putting myself out there. My favorite training loops go in a fairly serene direction compared to Elm Street and the Route 28 corridor. Drivers are always more aggressive on that trade route to the outside world. I don't look forward to that. But driving sucks.
Back to the subject of PPE, I did not see many mask users in the grocery store yesterday. I had wadded up a couple of bandannas in my pocket, but I wussed out and didn't tie them on. I did bring in my own bottle of alcohol to douse the cart handle and periodically rub on my hands. Reusable gear is only as good as your cleaning procedures. Disposable equipment needs to be replaced regularly. And people being people, they're chucking used gloves wherever they feel like it: leaving them in a cart for the next person to deal with, or overworked and under-protected grocery store personnel to throw away, or just ditching them in the parking lot. Roadside litter and the contents of any trash can are now biohazards.
Stay classy!