Subways sparkle, but does cleaning decrease COVID-19 risk?

A contractor uses an electrostatic sprayer to disinfect subway cars at the 96th Street station to control the spread of COVID-19 on Thursday in New York. Mass transit systems around the world have taken unprecedented — and expensive — steps to curb the spread of the coronavirus, including shutting down New York subways overnight and testing powerful ultraviolet lamps to disinfect seats, poles and floors.

John Minchillo | AP photo