the highest risk is in infants and they're also at greatest risk for complications if they develop the disease. in fact most of the pertussis deaths in the country each year are in infants less than 6 months of age most often in those too young to have received their first vaccination. although pertussis is most dangerous for infants people of any age can get the infection and may cough for weeks or months.
who is most at risk for whooping cough?