Published 1992 in American journal of diseases of children
To compare the reactogenicity and immune response to the Takeda acellular pertussis-component diphtheria-tetanus-pertussis (APDT) vaccine in children when immunization commenced at 2 months (group A) vs 3 months (group B) of age.
Longitudinal, nonblinded, comparative study.
Pediatric well-child clinics.
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