CDC: Whooping cough rising at alarming rate in US

Thursday, July 19, 2012 | 3:39 p.m. CDT; updated 4:38 p.m. CDT, Thursday, July 19, 2012

ATLANTA — The U.S. appears headed for its worst year for whooping cough in more than five decades, with the number of cases rising at an epidemic rate that experts say may reflect a problem with the effectiveness of the vaccine.

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