A Phase IV, Single Centre, Open-label Study to Evaluate the Persistence of Antibodies in Adolescents 14-16 Years of Age, Vaccinated With Chiron Meningococcal C Conjugate Vaccine During the 1999-2001 UK MenCC Immunization Campaign, at One Year After Either a Challenge Dose of Aventis Pasteur MSD Meningococcal A/C Polysaccharide Vaccine or a Booster Dose of MenC Vaccine, in Parallel to Subjects Aged 11-20 Evaluated at 4 Years After Vaccination During the 1999-2001 UK MenCC Immunization Campaign
A Phase IV, Single Centre, Open-label Study to Evaluate the Persistence of Antibodies in Adolescents 14-16 Years of Age, Vaccinated With Chiron Meningococcal C Conjugate Vaccine During the 1999-2001 UK MenCC Immunization Campaign, at One Year After Either a Challenge Dose of Aventis Pasteur MSD Meningococcal A/C Polysaccharide Vaccine or a Booster Dose of MenC Vaccine, in Parallel to Subjects Aged 11-20 Evaluated at 4 Years After Vaccination During the 1999-2001 UK MenCC Immunization Campaign
Persistence of Immune response after vaccination with MCC
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