BOSTON, MASSACHUSETTS - APRIL 08: A sign on the Longfellow Bridge encourages social distance among runners on April 08, 2020 in Boston, Massachusetts. A stay-at-home order by by Gov. Charlie Baker is in effect through May 4, while Boston Mayor Marty Walsh has enacted a recommended curfew of 9 p.m. and is encouraging the use of face masks in public spaces. (Photo by Maddie Meyer/Getty Images)