A general, region by region starting point for travel vaccinations and malaria prevention, and why timing your GP or travel clinic visit matters more than most people realise.
Most travel vaccines are not instant. Some need a course of two or three doses spread out over several weeks, and others take a week or two after the final dose to give full protection. Booking your GP or travel clinic appointment as soon as you book your trip, rather than the week before you fly, gives your body time to actually build immunity before you need it.
Before thinking about anything destination-specific, it is worth confirming your routine vaccinations are up to date. Health authorities commonly recommend checking the following are current for any international trip, since diseases that are rare at home can still circulate in other countries:
If you are travelling to the Southern Hemisphere, keep in mind that flu season runs on the opposite calendar. A trip to South America or Australia in June or July is arriving into peak flu season, not leaving it behind.
On top of routine vaccines, three additional vaccines come up frequently for travel outside Western Europe, North America and similar higher-income regions, since the underlying diseases are more common where food and water hygiene standards differ:
Whether these apply to your specific trip depends on your destination, how long you are travelling, and where within a country you plan to go, so this is exactly the kind of detail a travel clinic will tailor to your actual itinerary.
Yellow fever is worth understanding on its own, since it works differently to other travel vaccines. Some countries in Africa and South America legally require proof of yellow fever vaccination for entry, regardless of your own health risk, under International Health Regulations. Separately, health authorities also recommend the vaccine for anyone actually travelling to or living in an at-risk area, whether or not their destination requires proof.
These are not always the same list. A country can require proof of vaccination from travellers arriving from other at-risk countries without having transmission risk itself, and a country can have transmission risk without requiring proof of vaccination at all. Checking both separately for your specific route matters.
The vaccine itself is given as a single dose, becomes valid 10 days later, and current guidance treats one dose as protection for life, so there is no need for a booster every 10 years as older advice used to require. It is only administered at designated, officially authorised vaccination centres, and you will be issued an International Certificate of Vaccination as proof. Because the vaccine carries a small risk of serious side effects, it is only recommended for travellers who genuinely need it, not given as a routine precaution.
Malaria is present across parts of sub-Saharan Africa, South and Southeast Asia, and Central and South America. Unlike the diseases above, most travellers are not protected through vaccination. Malaria vaccines exist, but they are currently used mainly in childhood immunisation programmes within malaria-endemic countries, rather than offered as routine pre-trip protection for visitors.
For travellers, malaria prevention instead usually means two things together: prescription antimalarial tablets appropriate to your specific destination, taken on the correct schedule before, during and after your trip, and reducing mosquito bites through repellent, covering up in the evenings, and sleeping under a treated net where relevant. A GP or travel clinic can prescribe the right antimalarial tablets for your exact itinerary, since the recommended option varies by region and by any other medication you take.
These are broad starting points, not a checklist to rely on for a specific trip. Exact recommendations always depend on your precise itinerary and current health advisories, which change over time.
Yellow fever risk and entry requirements are common across much of this region, alongside malaria risk in most areas and a higher general likelihood of hepatitis A and typhoid recommendations.
Typhoid and hepatitis A are frequently recommended, and malaria risk exists in parts of the region, particularly rural and forested areas away from major cities.
Yellow fever risk applies to parts of the Amazon basin and surrounding areas, though not the whole continent, alongside typhoid, hepatitis A, and malaria risk in some regions.
Routine and hepatitis A or typhoid recommendations are common, and travellers visiting for religious pilgrimage should check specific meningitis vaccination requirements well in advance, since these are sometimes mandatory for entry during peak pilgrimage periods.