July 21, 2012
This Monday, Sept. 19, 2011 file photo shows an empty bottle of Tetanus, Diphthera and Pertussis, (whooping cough) vaccine at Inderkum High School in Sacramento, Calif. Health officials say the U.S. is on track to have the worst year for whooping cough in more than five decades.
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Whooping cough was once a terrible menace to U.S. children, with hundreds of thousands of cases reported annually. Then a vaccine drove cases down, and the illness became thought of as rare and even antiquated.
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