to evaluate recent immunization against diphtheria , tetanus , and pertussis ( dtp ) as a possible risk factor for sudden infant death syndrome ( sids ) , we studied the rates of sids after the administration of dtp vaccine in a cohort of 129,834 children who were born in four urban tennessee counties during the period from 1974 through 1984 .
C0043167
pertussis
C0031237
dtp vaccine