Five years after COVID-19 first hit the United States, scientists are already brainstorming how to stop the next big virus.

As Austin transportation leaders gather feedback on the city’s future light rail, they’ve given some people the opportunity to “experience” the system firsthand — all within a headset.

One possible solution? A special kind of ultraviolet light called far-UVC, CBS News reported. Unlike regular UVC light, which can be harmful to people, far-UVC has a shorter wavelength.