Covid-19 is not the only infectious agent out there. Daily sanitizing of mass transit will reduce the infection loads of all sorts of diseases, not to mention reducing the spread of future unmentioned accidental lab releases. And of course the usual kinds of vermin temporarily between hosts. Ick.
[IsraelTimes] Mass transit systems around the world have taken unprecedented and expensive steps to curb the spread of the coronavirus (aka COVID19 or Chinese Plague)
...the twenty first century equivalent of bubonic plague, only instead of killing off a third of the population of Europe it kills 3.4 percent of those who notice they have it. It seems to be fond of the elderly, especially Iranian politicians and holy men....Mass transit systems around the world have taken unprecedented — and expensive — steps to curb the spread of the coronavirus, including New York shutting down its subways overnight and testing powerful ultraviolet lamps to disinfect seats, poles and floors.
The cleaning measures produced something commuters have not seen in a while, or possibly ever: thousands of freshly scrubbed cars that look, feel and even smell clean. But experts say those steps solve only part of the problem, and transit officials are studying more advanced methods that might someday automatically disinfect transit systems around the clock.