Figure 1.

Time schedule of study vaccination, study visits, and concomitant vaccinations.
The study protocol allowed other concomitant vaccinations (e.g., rotavirus) according to the national immunization programs.
Ih group: study participants receiving DTPa‑HBV‑IPV/Hib vaccine; Va group: study participants receiving DTaP5‑HB‑IPV‑Hib vaccine
Men, meningococcal vaccine (monovalent serogroup B, C or tetravalent A, C, W-135 and Y); PCV, pneumococcal polysaccharide conjugate vaccine; V, study visit.