Background. No immunogenicity data has been reported after a single dose of the quadrivalent HPV vaccine (qHPV- @entity14849  ) and no data are available on co-administration of this vaccine with the HAV/ @entity97 vaccine (Twinrix-Junior  ). Two pre-licensure studies reported similar anti-HPV but lower anti-HBs titers when co-administering HPV and @entity97 vaccines.    Objectives. To assess the immunogenicity of the qHPV and HAV/ @entity97 vaccine when co-administered (Group-Co-adm) or given one month apart (Group-Sep) and to measure the persistence of HPV antibodies three years post-second dose of qHPV vaccine in both study groups. Methods. 416 9-10 year-old @entity1 were enrolled. Vaccination schedule was 0-6 months. Anti-HAV and anti-HBs were measured in all subjects 6 months post-first dose and 1 month post-second dose. Anti-HPV were measured 6 months post-first dose in Group-Co-adm and in all subjects 1 and 36 months post-second dose. Results. Six months post-first dose: 100% of subjects had detectable anti-HAV and 56% and 73% had detectable anti-HBs in Group-Co-Adm and Group-Sep, respectively. In Group-Co-adm 94, 100, 99 and 96% had detectable antibodies to HPV 6, 11, 16 and 18, respectively. One month post-second dose of qHPV and HAV/ @entity97 vaccine, in both study groups 99.5-100% of subjects had an anti-HAV titer >=  20IU/L, 97.5-97.6% an anti-HBs level >=  10IU/L, and 100% had an anti-HPV titer >=  3LU. Thirty-six months post-second dose of qHPV all but four subjects (99%) had antibodies to HPV18 and 100% had antibodies to HPV6, 11 and 16. The great majority (97-100%) had an anti-HPV titer >=  3 LU. Post-second dose administration of qHPV and HAV/ @entity97 , no meaningful difference was observed in the immune response in the two study groups to any component of vaccines. Conclusions. The results indicate that qHPV and HAV/ @entity97 can be given during the same vaccination session. Two doses of of qHPV and HAV/ @entity97 vaccines induce a strong immune response. Three years post-second dose of qHPV, the great majority of subjects had antibodies to HPV types included in the vaccine. A two-dose schedule for pre-adolescents might be a reasonable alternative to the currently approved three-dose schedules.

Immunogenicity of quadrivalent HPV and combined hepatitis A and B vaccine when co-administered or administered one month apart to 9-10 year-old XXXX according to 0-6 month schedule.

@entity1 :: ('9606', 'Species') :: ['girls'] @entity97 :: ('10407', 'Species') :: ['HBV'] @entity14849 :: ('MESH:C512720', 'Chemical') :: ['Gardasil']
@entity1 :: (9606,Species) :: ['girls']
