Pertussis increase in Maricopa County
Since Jan. 1, there has been a 240 percent increase in confirmed pertussis cases reported to the Maricopa County Department of Public Health compared with the same time period during 2011. This represents a nearly 600 percent increase compared with 2010.
Pertussis should be suspected in all symptomatic infants, children and adults regardless of immunization status. Fully immunized children can still develop pertussis and present with milder symptoms, as vaccine efficacy is not 100 percent and wanes with age. In 76 percent of cases, infected adults or older children in the household are the source of infant pertussis. Infants frequently become seriously ill with complications of pertussis and often require hospitalization.
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