Who may need the yellow fever vaccine?

A recommendation depends on where you are going, the season and type of travel, time spent outdoors, and any transit countries. Requirements for entry and a medical recommendation are related but not identical: a country may request a certificate even when an individual’s exposure is limited. The clinician weighs the chance of mosquito exposure against the person’s health circumstances and checks whether a prior valid certificate already exists.

Book with a travel-health clinician if you are planning relevant travel. Bring your itinerary, vaccination record, medicine list, and information about allergies. A careful discussion is especially important for infants and older adults, people who are pregnant or breastfeeding, and anyone with an immune-system condition or treatment that affects immunity. The clinician can explain whether vaccination, a medical exemption, changed travel plans, or enhanced bite prevention is appropriate.

During or after travel, seek urgent medical assessment for fever with severe headache, repeated vomiting, extreme weakness, yellowing of the skin or eyes, unusual bleeding, confusion, or breathing difficulty. Give a clear travel history, including rural visits and mosquito bites. Following any vaccination, urgent symptoms such as breathing trouble, facial swelling, widespread hives, or fainting also require prompt medical attention.

Ask whether every stop on your route changes the recommendation, whether an entry certificate is needed, and how your medical history affects eligibility. Ask which other vaccines, medicines, and anti-mosquito measures should be considered for the journey.