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November 28, 2012 There were more than 9,000 whooping cough cases in California in 2010, a 60-year high. There has been a resurgence of the disease across the country lately. Why? People going without vaccination is one factor. Another may lie in the vaccines themselves.

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September 13, 2012 Young kids who get all their whooping cough shots on time could become susceptible to the disease again when they're between 8 and 11. Researchers say the immune protection conferred by the current vaccine loses its punch.

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August 3, 2012 A study from Australia finds that the current vaccine for whooping cough wanes more quickly than expected, which may be helping to fuel the epidemic that's been plaguing the West Coast of the U.S.

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June 11, 2012 Some 338 people have been infected with whooping cough in Oregon this year. But that's just a small fraction of the number of cases the state of Washington is reporting. Health experts say the booster shot is not 100 percent effective at preventing the disease, but people who have it are far less likely to get sick.

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May 10, 2012 KUOWAbout 1 in 5 infants who get whooping cough will get pneumonia, and in some cases die. In Washington state, where confirmed cases are 10 times as high as they were last year, officials hope federal investigators will help them trace the source of the current outbreak.

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March 23, 2012 Whooping cough has reappeared in the U.S. and other developed countries in recent years, despite widespread use of vaccines. Researchers in Australia offer a partial explanation: they say the vaccine isn't tailored to fight some of the most common strains of the bacteria.

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February 22, 2012 An expert panel is expanding an earlier recommendation that seniors be vaccinated if they have contact with very young infants. Now just about all seniors will be candidates for vaccination. Adults and teens have been on the recommended list for years already.

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