Dengue vaccine for adults: what to know

Dengue vaccines are designed to prepare the immune system for dengue virus, but eligibility and the recommended schedule can differ between products and health systems. A previous dengue infection may affect whether vaccination is suitable. Tell the clinician about pregnancy, immune problems, allergies, regular medicines and any planned travel.

Vaccination does not replace mosquito-bite prevention, and it does not treat an illness that has already started. Fever, headache, joint pain, muscle aches, chills or easy bruising can occur with dengue and need clinical context rather than self-diagnosis.

Arrange a GP consultation before booking the vaccine, especially if you are travelling to an area where dengue occurs. Bring your vaccination history and details of any past dengue test or diagnosis. Use repellent, wear clothing that covers exposed skin, and reduce standing water around your home while discussing vaccination.

Seek prompt medical assessment for a fever after possible dengue exposure, particularly if it comes with severe headache, marked joint or muscle pain, repeated vomiting, abdominal pain, bleeding or easy bruising. Urgent care is needed for confusion, fainting, breathing difficulty, severe weakness or inability to drink. Avoid taking aspirin or ibuprofen until a clinician advises you, because bleeding risk may need consideration.

Ask whether your age, previous dengue infection, medical conditions and travel plans make vaccination appropriate. Clarify the number and timing of doses, expected reactions, other ways to prevent bites, and what symptoms should trigger review.