State health officials say the whooping cough epidemic is slowing down but the disease has not left Washington. Health Secretary Mary Selecky says
Washington adults and teens should continue to update their immunity by getting booster shots so that babies who are still building their immunity do not get exposed to the serious illness. This year, Washington has seen the most cases of whooping cough in more than 70 years. More than 4,500 cases have been reported so far in 2012.