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Four and one-half-year follow-up of the effectiveness of diphtheria-tetanus toxoids-acellular pertussis/Haemophilus influenzae type b and diphtheria-tetanus toxoids-acellular pertussis-inactivated poliovirus/H. influenzae type b combination vaccines

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General Info
Geography 
Germany (DEU)
Coverage type 
Country
Time period covered 
01/1996 - 08/1998