Medical Experts Concerned About Whooping Cough Outbreaks: Vaccine May Be Losing Potency

February 9, 2015 2:09 PM

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The infection rates of whooping cough are three times to five times higher in a large suburb in Sacramento, raising concerns that the current vaccine for the disease may have lost its potency.(Photo : National Institutes of Health)

The infection rates of whooping cough are three times to five times higher in a large suburb in Sacramento, raising concerns that the current vaccine for the disease may have lost its potency.

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