the 457 study children , 6 , 10 and 16 years of age , had as infants received routine primary vaccination with three doses of diphtheria-tetanus-toxoid or diphtheria-tetanus-pertussis vaccine , and the 16 year-olds also had received a booster dose of tetanus with a small dose of diphtheria at the age of ten .
C0008059
children
C0021270
infants