https://techcrunch.com/2020/05/07/uber-may-use-its-selfie-tech-to-verify-drivers-are-wearing-masks/

When Uber rolled out its selfie system for drivers in 2016, the ride-hailing company was focused on preventing fraud. In the future, it could be used to ensure drivers are wearing a mask.

Uber said earlier this week — CEO Dara Khosrowshahi reiterated today — that it is working through plans to require drivers and riders to wear face masks or face coverings as it prepares to ramp its ride-hailing business back up after being hobbled by the COVID-19 pandemic. The mask requirement will be issued in certain countries, including the United States.