Act-HIB
Haemophilus influenzae type b conjugate vaccine · Sanofi Pasteur
Prevents
Dosing schedules
Children under 6 months: 3 doses and a booster 12 months after dose 3
For: Infants (0–1 year)
| Dose | Age | Minimum interval from previous dose |
|---|---|---|
| Dose 1 (Act-HIB) | Children not receiving a Hib-containing combination vaccine | – |
| Dose 2 (Act-HIB) | 1–2 months after dose 1 | 30 days |
| Dose 3 (Act-HIB) | 1–2 months after dose 2 | 30 days |
| Booster (Act-HIB) Booster | 12 months after dose 3 | 365 days |
Source: Recommended vaccination schedules for all ages in Vietnam (2026 edition). Reviewed on 07/10/2026.
Children aged 6–11 months: 2 doses and a booster 12 months after dose 2
For: Infants (0–1 year)
| Dose | Age | Minimum interval from previous dose |
|---|---|---|
| Dose 1 (Act-HIB) | 6 months | – |
| Dose 2 (Act-HIB) | 1–2 months after dose 1 | 30 days |
| Booster (Act-HIB) Booster | 12 months after dose 2 | 365 days |
Source: Recommended vaccination schedules for all ages in Vietnam (2026 edition). Reviewed on 07/10/2026.
Children aged 1–5 years: 1 dose
For: Young children (1–3 years)
| Dose | Age | Minimum interval from previous dose |
|---|---|---|
| Single dose (Act-HIB) | 12 months | – |
Source: Recommended vaccination schedules for all ages in Vietnam (2026 edition). Reviewed on 07/10/2026.
Special precautions
Used when the child does not receive a combination vaccine containing Hib (5-in-1, 6-in-1).