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

By Mitch Smith, Benjamin Guggenheim, John Yoon, Edgar Sandoval, Kate Taylor, Madeleine Ngo and Lauren Hirsch from NYT U.S. https://www.nytimes.com/live/2021/05/14/world/covid-vaccine-coronavirus-cases/cdc-masks-states-reaction?partner=IFTTT