ST. PAUL, Minn. (AP) - More than 4,300 Minnesota residents were diagnosed with whooping cough this year.
Minnesota Public Radio News (http://bit.ly/RhXFy9 ) reports a quarter of the cases were among children ages 9 to 12. The number is far more than in any year since World War II.
Experts say the reason for the increased number is a redesigned vaccine that was introduced in 1991 to reduce the side effects.
Patsy Stinchfield is director of pediatric infectious disease services for Children's Hospitals and Clinics of Minnesota. She says the vaccine's protection doesn't last as long, something that has taken time to observe.
Before the first pertussis vaccine became available in the United States in 1943, Minnesota had as many as 5,000 cases some years.
All content © Copyright 2001 - 2013 WorldNow and KTTC, a Quincy station.
Persons with disabilities who need assistance with issues relating to the content of this station's public inspection file should contact Administrative Assistant Jodi Neyens at (507) 280-5104. Questions or concerns relating to the accessibility of the FCC's online public file system should be directed to the FCC at 888-225-5322, at 888-835-5322 (TTY) or at email@example.com.