Posted: Nov 28, 2012 9:24 AM by NBC News
Whooping cough cases reached peak levels over the past couple years, and experts at the Centers for Disease Control and Prevention are now learning what's behind the spike.
In a new study, researchers at the CDC studied cases of pertussis in 15 counties in California in 2010.
They found children with whooping cough were less likely to have received all five doses of the vaccine.
They also found children who were vaccinated were coming down with the illness, as it appears the vaccine loses effectiveness over time.
Experts say children who are fully vaccinated are protected from the virus more than 90% of the time; however, five years after their last dose, that number drops to 70%.
Experts say a booster shot is recommended around age eleven.
Pregnant women and anyone caring for infants should also get a booster.
PLEASE HELP US MODERATE COMMENTS
Offensive or inappropriate comments are subject to removal. To report a comment, please e-mail us at email@example.com, and include the name of the story and information on the comment.
Thank you! KSBY.com
Get deals up to 80% off here!
Find the lowest gas prices in your area
Submit your photos to KSBY
Check out our calendar of events
Watch Daybreak Web Videos in full
Save with Hot Deals across our counties!
Events across the Central Coast
Follow The CW5 on Facebook.
The KSBY online public file.
What do you think? Leave us your feedback.
KSBY is your official CA Lottery station for San Luis Obispo and Santa Barbara Counties