Health officials are sending out warnings after the number of Whooping Cough cases has doubled the yearly average.
Allegheny County is experiencing a high number of whooping cough cases with 51 confirmed and probable cases reported so far this year compared to about 47 cases reported in all of 2013.
Pittsburgh Public Schools officials and the Allegheny County Health Department have confirmed 11 cases of whooping cough at a city high school.
Whooping cough in the Shaler Area School District is sounding an alarm. Out of an abundance of caution, Superintendent Wesley Shipley has issued a letter to parents.
A new study in the New England Journal of Medicine is raising concerns about that final dose of whooping cough vaccine and just how long it protects children.