Masks are no longer required on many major airlines and at some U.S. airports. Amtrak, Uber, and some public transit systems have also dropped mask requirements.
These changes come after a federal judge on Monday struck down the Center for Disease Control and Prevention's mask mandate.
Here & Now's Scott Tong talks with Saskia Popescu, epidemiologist and infectious disease expert at George Mason University, about the risks of taking public transit while COVID-19 infections are on the rise again.
This segment aired on April 19, 2022.