Seattle Police officer Rosell Ellis, right, wears an N95 mask as he listens to conversation during a routine call Thursday, April 2, 2020, in Seattle. As police and fire departments across the country face personnel shortages due to the spread of the new coronavirus, masks and other protective gear are being used to keep officers and firefighters still on the streets safe and healthy. (AP Photo/Ted S. Warren)

Forest Gauthier, an emergency services medical assistant, walks through a tent set up outside the Emergency Department at the Harborview Medical Center before it opened for patients, Thursday, April 2, 2020, in Seattle. The tent, which was recently put in place, is used to examine walk-up and other patients who arrive at the emergency room with respiratory symptoms possibly related to the new coronavirus. (AP Photo/Ted S. Warren)

Seattle Police officers wear N95 masks as they listen to conversation during a routine call Thursday, April 2, 2020, in Seattle. As police and fire departments across the country face personnel shortages due to the spread of the new coronavirus, masks and other protective gear are being used to keep officers and firefighters still on the streets safe and healthy. (AP Photo/Ted S. Warren)

Seattle police officers wear N95 masks and practice social distancing as they listen to conversation during a routine call Thursday, April 2, 2020, in Seattle. As police and fire departments across the country face personnel shortages due to the spread of the new coronavirus, masks and other protective gear are being used to keep officers and firefighters still on the streets safe and healthy. (AP Photo/Ted S. Warren)