At a nursing facility in Kirkland, Wash, approximately 27 of the 108 residents and 25 of the 180 staff have some symptoms, health officials said during a teleconference with the Centers for Disease Control and Prevention. Authorities report that some among them have pneumonia.

“We are very concerned about an outbreak in a setting where there are many older people, as we would be wherever people who are susceptible might be gathering,” said Jeff Duchin, health officer for public health for Seattle and King County. He added that older adults and people with underlying health conditions like diabetes, heart or lung disease should be especially careful to protect themselves by washing their hands, not touching their faces, and avoiding contact with people who are sick.

The deceased, a man in his 50s with underlying health conditions, was not a resident of the facility, and officials have not yet found a link between his case and the outbreak in the nursing facility.