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  • Title: Absence of a significant interaction between a Haemophilus influenzae conjugate vaccine combined with a diphtheria toxoid, tetanus toxoid and acellular pertussis vaccine in the same syringe and inactivated polio vaccine.
    Author: Daum RS, Zenko CE, Given GZ, Ballanco GA, Parikh H, Vidor E, Liu X.
    Journal: Pediatr Infect Dis J; 2000 Aug; 19(8):710-7. PubMed ID: 10959738.
    Abstract:
    BACKGROUND: We compared the antibody response to Haemophilus influenzae type b capsular polysaccharide (PRP) after three doses of a diphtheria toxoid, tetanus toxoid and acellular pertussis vaccine (DTaP) combined with a PRP-tetanus conjugate (PRP-T) in infants randomized to receive oral polio vaccine (OPV) or inactivated polio vaccine (IPV). The polio vaccine was given separately at the same visit. METHODS: Three hundred fifty-six infants from pediatric practices in suburban Chicago and New Orleans were randomized into two groups. Group A received OPV at 2 and 4 months of age; Group B received IPV at 2 and 4 months of age. Both groups received DTaP/PRP-T at 2, 4 and 6 months of age and hepatitis B vaccine at 2 and 4 months of age. A serum sample was obtained before immunization (age 2 months) and 1 month after 3 doses of DTaP/PRP-T (age 7 months). Sera were assayed for antibody responses to all relevant vaccine antigens. RESULTS: No significant vaccine antigen interference was found when polio immunization was provided by IPV or OPV for anti-PRP, diphtheria, tetanus or pertussis antibodies. OPV recipients had a significantly higher mean antibody response to serotype 1 (P = 0.03) and 2 (P = 0.0001) poliovirus. CONCLUSION: Whether polio immunization was accomplished with IPV or OPV did not significantly influence the antibody responses in sera obtained at 7 months of age for anti-PRP, anti-diphtheria and anti-tetanus toxoid antibodies and antibodies to pertussis antigens, when DTaP/PRP-T was given in the primary series.
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