The Grant County Health District continues to see new cases of pertussis, also known as whooping cough, and is up to 28 cases since August, officials said Tuesday.
Cases are coming from Quincy, Ephrata and Moses Lake, with some linked by household members or close contacts. But the origin of some illness are unknown.
No one is hospitalized with whooping cough, but an infant died from it Aug. 24.
Whooping cough symptoms begin like a cold, with a runny nose, sneezing, mild fever and a cough that slowly gets worse. The second stage includes uncontrolled coughing spells and a whooping noise when the person inhales.
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Anyone who thinks they or their child may have pertussis should stay home and not attend school or work and see a health care provider.
Anyone who thinks they may have been exposed to someone with pertussis should call the health district at 766-7960.