Pertussis among infants younger than 1 year of age remains high

The pertussis rate among infants younger than 12 months of age is high, and the incidence is highest among 3-month-olds, according to a nationwide study of 1.2 million infants.

Pertussis is the least-controlled bacterial disease for which a vaccine is universally recommended, according to the Centers for Disease Control and Prevention. However, limited data are available on the disease burden in U.S. infants.   

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