![AHA in the news](/sites/default/files/2019-09/aha-in-the-news.jpg)
Between March 22 and Oct. 17, 2020, weekly COVID-19-associated hospitalization rates reported by 10 COVID-19-Associated Hospitalization Surveillance Network sites declined by 5.5 percentage points for adults under age 65 after states began mandating the use of facemasks, according to a report released by the CDC.