Philadelphia whooping cough cases on the rise

A rise in reported cases of whooping cough in causing concern in the greater Philadelphia area, health officials say.
The suburban counties of Southeastern Pennsylvania have witnessed increased occurrences of the infection, which can be fatal in infants, reports. Delaware County saw the largest increase in cases, jumping from five cases to 44 within a three month period.

The second highest increase in whooping cough cases was in Montgomery County, reports, where 39 new cases were tallied between April and June, compared to eight new cases in the three months preceding.
Whooping cough is a highly contagious disease that affects between 5,000 to 7,000 thousand people a year in the United States.
A vaccine is commonly available and most deaths result among unvaccinated children or children to young for the vaccine. While many communicable diseases are passed from children to adults, whooping cough is often passed from adults to children. In most cases, the adult may show few signs of infection.
According to the Center for Disease Control and Prevention, whooping cough is an endemic disease with outbreaks occurring every three to five years.
The last major whooping cough outbreak, in which there were 25,616 cases, occurred in 2005.