Video 1. Maps of confirmed enterovirus cases detected among homeless shelter residents and in environmental samples at shelter L, King County, Washington, USA, October 10, 2019–January 10, 2020. A total of 20 enterovirus-confirmed cases were identified (19 coxsackievirus A21, 1 enterovirus D68); 2 top bunks had multiple residents who were positive for coxsackievirus A21 over time (1 bunk with a resident CVA21-positive on October 21, 2019, followed by a second resident CVA21-positive in the same bunk on November 4, 2019; separately, another bunk had 3 different residents CVA21-positive on 3 dates: October 14, 2019, January 8, 2020, and January, 10, 2020); 1 resident positive for coxsackievirus A21 missing sleeping location; 4 enterovirus-positive environmental samples. Breaks in green lines indicate doorways or entranceways. All dorms have bunk beds (i.e., men’s dormitory consists of 61 bunks, 122 beds total); 2 smaller women’s dormitories are located on another floor. C.R.P., Crisis Response Program.