Vaccine type		Minimal interval between dose 1 and 2	Minimal interval between dose 2 and 3	Minimal interval between dose 3 and 4
Hepatitis B		1 month	2 months†
DTP/DTaP (DT)‡		4 weeks	4 weeks	6 months
Hib (primary series)
	HbOC	1 month	1 month	2 months and ≥12 months old§
	PRP-T	1 month	1 month	2 months and ≥12 months old§
	PRP-OMP	1 month	2 months and ≥12 months old§
Poliovirus		4 weeks	4 weeks	No earlier than 4 years
MMR∥		1 month∥