A person wearing a face masks to protect against the spread of the coronavirus walks in Philadelphia, Feb. 16, 2022. The Biden administration will extend for two weeks the nationwide mask requirement for public transit as it monitors an uptick in COVID-19 cases. The Centers for Disease Control and Prevention was set to extend the order, which was to expire on April 18, by two weeks to monitor for any observable increase in severe virus outcomes as cases rise in parts of the country. (AP Photo/Matt Rourke, FILE