What should you know about hepatitis B and yellow fever vaccine?

Hepatitis B vaccination helps prevent hepatitis B, a viral infection that can affect the liver and spread through infected blood or certain body fluids. Protection is especially relevant before healthcare work, travel, household exposure, or other situations identified by a clinician.

Yellow fever vaccination helps prevent yellow fever, a mosquito-borne viral illness found in some tropical areas. Some countries require proof of vaccination for entry or transit, so travel plans, routing and the destination's current rules should be checked with a travel-health service.

These vaccines are not interchangeable: hepatitis B vaccination does not protect against yellow fever, and yellow fever vaccination does not protect against hepatitis B. The yellow fever vaccine is a live vaccine, so medical history matters before it is given.

Arrange a pre-travel or primary-care appointment well before departure. Bring your vaccination record, planned itinerary, departure date, current medicines, allergy history and details of pregnancy, immune conditions, or previous reactions to vaccines.

A clinician can decide whether each vaccine is suitable, explain the hepatitis B schedule if more than one dose is needed, and provide or update vaccination documentation. If both are recommended, they can be administered at separate injection sites during one visit or timed according to your clinical needs.

After vaccination, soreness, redness, tiredness or a mild fever can occur. Rest, drink fluids and follow the aftercare advice supplied by the vaccination service. Vaccination does not replace mosquito-bite prevention while travelling; use repellent, covering clothing and accommodation with effective screening or air conditioning where available.

Seek urgent medical help after vaccination for trouble breathing, swelling of the face or throat, widespread hives, collapse, or rapidly worsening symptoms. These can signal a serious allergic reaction.

Contact a clinician promptly for a persistent high fever, confusion, severe weakness, yellowing of the skin or eyes, or symptoms that concern you after travel. Before a yellow fever vaccine, ask for an individual assessment if you are pregnant, have a weakened immune system, have a thymus disorder, or have had a severe allergy to a vaccine component.

Ask which vaccines your destination, work or medical history calls for, whether your existing records show adequate hepatitis B protection, and when any follow-up dose should be scheduled. Also ask whether your medicines or health conditions affect yellow fever vaccine eligibility, what travel certificate you need, and which symptoms should prompt urgent review.