The Grant County Health District in Ephrata has downgraded the whooping cough outbreak.
Since October, the number of whooping cough cases has declined. However, the county continues to experience a greater number of cases than neighboring counties.
Last year, 29 cases of whooping cough were reported. There were 57 cases investigated by the health district during the 16-month outbreak, which included one infant death. In the previous five years, Grant County reported 1 to 4 cases per year.
Whooping cough is a threat throughout the state as the number of cases has increased by more than 40 percent between 2010-11. Two infants died from whooping cough in Yakima and Snohomish counties in 2011.
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The Grant County Health District recommends all residents make sure their pertussis vaccine is current because the effects of the vaccine wear off.
For more information, go to granthealth.org/pertussis.html.