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Study: Whooping Cough Vaccination Fades In 3 Years

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(credit: Justin Sullivan/Getty Images)

(credit: Justin Sullivan/Getty Images)

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LOS ANGELES (CBS/AP) — A preliminary study suggests the vaccine against whooping cough falters after only about three years, adding support to school rules requiring kids to get the vaccination periodically.

Schools across Southern California have turned away thousands of students this fall who aren’t up to date on their shots. California had a huge spike in whooping cough cases last year, and 10 babies died after exposure from adults or older children.

The study in one California county found the risk of getting the disease was as much as 20 times higher in kids three years or more after they finished receiving a recommended series of vaccinations. But kids vaccinated more recently were well protected.

Dr. David Witt, the lead researcher, presented the findings Monday at an infectious diseases medical conference in Chicago.

(TM and © Copyright 2011 CBS Local Media, a division of CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2011 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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