SII Hepatitis B Vaccine: What to Know

Hepatitis B is a viral infection that can affect the liver and may spread through infected blood or body fluids. Vaccination prepares the immune system to recognise the virus before exposure. It does not treat an existing hepatitis B infection and does not replace testing after a possible exposure.

A clinician may ask about previous doses, pregnancy, immune-system conditions, allergies, occupation, household or sexual exposure, and travel or healthcare plans. Fatigue or dark urine can occur with liver illness, but symptoms alone cannot establish the cause. Testing and, when needed, a liver function test help guide evaluation.

Bring any vaccination record and tell the vaccinator about past reactions, current medicines, pregnancy, and conditions affecting immunity. Follow the schedule provided by the clinic and keep appointments so the course can be completed. If a dose is delayed, contact the clinic for advice rather than restarting on your own. Vaccination does not remove the need for safer sex, sharps safety, or prompt assessment after an exposure.

Seek medical advice promptly after a needlestick, shared needle, unprotected contact with infected blood, or another possible exposure, even if you have been vaccinated. Get urgent help for breathing difficulty, facial swelling, widespread hives, fainting, or severe weakness after an injection. Arrange a review for persistent fatigue, yellowing of the skin or eyes, dark urine, abdominal discomfort, or vomiting.

Which hepatitis B vaccination schedule fits my age, work, health, and exposure risk? Do I need a blood test before or after vaccination? What should I do if I miss a dose? How should a recent exposure be managed?