An abrupt U.S. change on mask guidance has set off a confusing scramble for states and cities.

An abrupt U.S. change on mask guidance has set off a confusing scramble for states and cities. Mitch Smith, Benjamin Guggenheim, John Yoon, Edgar Sandoval, Kate Taylor, Madeleine Ngo and Lauren Hirsch https://ift.tt/3oq1uoc U.S. New York Times May 14, 2021 at 05:00AM