The New York Times @nytimes
The first U.S. cases of the 1918 influenza pandemic came in March. By fall, 7 cities — San Francisco, Seattle, Oakland, Sacramento, Denver, Indianapolis and Pasadena, California — had mandatory mask laws. San Francisco was at the forefront, becoming known as the “masked city.” https://t.co/UFyFR6Z3J2 — PolitiTweet.org