So far this year, Texas has tallied nearly 2,000 cases, two of them fatal, and the total is expected to exceed the 3,358 recorded in 2009, when the last such outbreak occurred, the Department of State Health Services said.

A CDC spokesman said he was aware of no major outbreaks this year. “We do not keep a comprehensive list of pertussis outbreaks since states only alert CDC to those if they need assistance,” said Jason McDonald in an e-mail. But Washington state declared an epidemic last year, and California did so in 2010.

Pertussis outbreak in Texas

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