Five people have contracted Hantavirus in Washington state, and three have died, reports Reuters. 

The first diagnosed case this year was in February and the most recent was last month, when the infection killed a resident of Spokane County in the eastern part of the state near Washington’s border with Idaho. Three of the five cases, including another one that proved fatal, were confirmed in the Puget Sound region of King and Skagit counties.

The only common factor among those infected by the disease, which typically kills more than a third of its victims, is that they were all exposed to infected mice, Johnson said.

The last time five confirmed hantavirus cases were diagnosed in Washington state in a single year was in 1999, although just one of those proved fatal, Johnson said.

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