ABSTRACT
This study compared a tetravalent DTaP-IPV vaccine (Di-Te-Ki-Pol vaccine "SSI") with the vaccination regimen used in Denmark at that time, DT-IPV plus wholecell pertussis vaccine. Two hundred and seventy children were included at their five-week routine examination. The children were allocated to one of the two vaccination regimens. No hypotonic-hyporesponsive episodes or other vaccine-related serious adverse events were seen. Local reactions, febrile and crying episodes following the investigational vaccine were similar to the reactions seen after Di-Te-Pol vaccine. All children achieved protective antibody levels to polio, diphtheria and tetanus after completing the vaccination schedule. A significantly better response to pertussis toxin was seen after the investigational vaccine. We conclude that the Di-Te-Ki-Pol vaccine is safe and immunogenic when used according to the schedule tested.
