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.
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.