Pertussis is endemic and there is an ongoing risk for exposure for all ages. Morbidity and mortality are highest in young infants.
Children are the most frequent age group with reported pertussis.
Pertussis is caused by bacteria. It can cause spells of violent coughing and choking, making it hard to breathe, drink, or eat. Pertussis is most serious for babies, who can get pneumonia, have seizures, become brain damaged, or even die. About two-thirds of children under 1 year of age who get pertussis must be hospitalized. Pertussis morbidity and mortality are highest in young infants.