Hepatitis B
乙型肝炎疫苗
The HK childhood immunisation success story. Nearly all HK residents born after 1988 are already vaccinated.
Engerix-B · HBVAXPRO
Hepatitis B is a virus that infects the liver. Chronic infection causes cirrhosis and liver cancer years later. HK is historically a high-prevalence area.
HK launched a universal infant vaccination programme in 1988. Coverage is now 99% among pre-school children, and hepatitis B prevalence in HK residents under 35 has dropped below 1%.
The vaccine uses recombinant hepatitis B surface antigen — no live virus, no risk of infection from the shot.
Infants under the HK Childhood Immunisation Programme: three doses at birth, 1 month, and 6 months.
Adults who were not vaccinated as infants — relevant for adults born before 1988, or those from places without universal programmes. Catch-up vaccination is available privately.
US CDC recommends hepatitis B vaccination for all infants and for all unvaccinated adults 19-59.
Standard 3-dose schedule: 0, 1 month, 6 months.
Accelerated adult schedule: 0, 1 month, 2 months, with booster at 12 months — for faster protection.
| Brand | Manufacturer | HK Reg No. |
|---|---|---|
| Engerix-B · Recombinant hepatitis B surface antigen | GSK | |
| HBVAXPRO · Recombinant hepatitis B surface antigen | MSD (Merck) |
Sore arm, mild fever, tiredness, headache. Lasts 1-2 days. Hepatitis B vaccine has one of the longest safety records of any modern vaccine.
Myth: I'm an adult now, so it's too late to vaccinate.
Reality: Not true. Adult catch-up vaccination produces protective antibody levels in around 95% of healthy adults after the full 3-dose course.
- Infants: automatic under the Childhood Immunisation Programme
- Adults seeking catch-up vaccination: see your GP
- Pre-travel: GP or travel health clinic
- HK CHP — Hepatitis B prevention and immunisation · HK Centre for Health Protection (HK)
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