Malaria prophylaxis means taking prescription tablets before, during and after a trip so that a bite from an infected mosquito never turns into malaria. For a medical elective, the honest answer is destination specific: of the four places travel4med sends students, only Zanzibar sits in an area where the US Centers for Disease Control and Prevention (CDC) recommends antimalarial tablets for essentially every traveller. Sri Lanka has been certified malaria free by the World Health Organization since 2016. Bali and Pokhara both sit outside the CDC's listed transmission areas. That does not mean you can skip the conversation. It means you walk into your travel clinic knowing what to ask.
Malaria prophylaxis is a course of prescription medicine that kills malaria parasites in your body before they can make you ill. It is not a vaccine and it is not permanent. You start it before departure, keep taking it on schedule for the whole placement, and continue for a set period after you leave the risk area, because some parasites are still developing in the liver when your flight lands.
Who needs malaria prophylaxis is decided by geography, not by how long you stay or how nice your accommodation is. A travel clinic looks at the exact regions on your itinerary, the season, what you will be doing, and your own medical history. That last part matters more for students than people expect. If you take regular medication, have a history of depression or epilepsy, or are pregnant, some antimalarials are off the table and others become the obvious choice.
The awkward truth for elective students is that a hospital placement is not a beach holiday. You may be commuting daily at dawn and dusk, spending evenings in shared housing with open windows, and travelling inland at weekends. All of that changes your exposure, and none of it shows up on a generic country page. So treat malaria prophylaxis as a decision about your itinerary and your body, not about the country name on your ticket.
Researched and written by the travel4med editorial team, which prepares medical and nursing students for supervised placements in Sri Lanka, Nepal, Bali and Zanzibar.
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Here is the comparison that most country guides never put side by side. Everything in this table comes from the CDC's Travelers' Health destination pages, all of which were updated on 23 April 2025, plus WHO's certification decision for Sri Lanka.
| Destination | CDC malaria transmission status | Chemoprophylaxis per CDC | What that means for your placement |
|---|---|---|---|
| Zanzibar (Tanzania) | All areas below 1,800 m | Recommended: atovaquone-proguanil, doxycycline, mefloquine or tafenoquine | Assume you will be prescribed tablets |
| Bali (Indonesia) | No transmission in the resort areas of Bali | Not indicated for Bali itself; risk sits in eastern Indonesia, Papua and rural Kalimantan | Bite avoidance yes, tablets usually no |
| Pokhara (Nepal) | No transmission in Kathmandu, Pokhara or on typical Himalayan treks | Only for areas under 2,000 m in Sudurpashchim and Karnali provinces | Tablets only if you add a lowland trip |
| Galle (Sri Lanka) | No malaria section on the CDC destination page | Not applicable | WHO certified the country malaria free in 2016 |
Three of those rows deserve a sentence each, because they are where students get bad information from forums and end up either buying malaria prophylaxis they do not need or skipping the course they do.
CDC does not carve Zanzibar out of Tanzania. The transmission area is written as all areas below 1,800 m, and the whole archipelago is coastal. The dominant parasite there is Plasmodium falciparum, the species that causes severe disease, and chloroquine resistance is documented. So for a placement at a hospital in Zanzibar, malaria prophylaxis is a normal part of the packing list rather than an optional extra. If you are heading there, read our practical guide to a clinical clerkship or nursing internship in Zanzibar alongside this one.
CDC states plainly that there is no malaria transmission in the resort areas of Bali, the Gili Islands, Jakarta or Ubud, and that Indonesia's risk sits in the eastern provinces, rural Kalimantan, Sulawesi and Sumatra. Nepal is the same shape of answer: no transmission in Kathmandu, Pokhara or on the usual trekking routes, with the real risk confined to lowland districts of Sudurpashchim and Karnali. Bali remains available for every placement format we run, including the final-year and practical-year placement, and being off the malaria map is one of the reasons it is an easy first trip. If your plans stay in Ubud, Denpasar or Pokhara, malaria prophylaxis usually will not come up at all. Details for both sit in our Bali clerkship guide and the medical elective in Nepal guide.
Sri Lanka reported its last locally acquired case in 2012 and WHO certified it malaria free on 5 September 2016. That certification is why the CDC destination page for Sri Lanka has no malaria section while it still lists dengue, leptospirosis and typhoid. Certification is not immunity, though. Imported cases still arrive, so clinicians there stay alert, and you should still avoid bites even where malaria prophylaxis is not indicated. Our Sri Lanka elective guide covers the rest of the health picture.
Bigger than the news cycle suggests. WHO's World malaria report 2025, published on 4 December 2025, put the global burden at an estimated 282 million cases and 610,000 deaths in 2024, a slight increase on 2023. The same report notes a real success alongside it: since 2000, malaria control has averted an estimated 2.3 billion cases and 14 million deaths, and 47 countries plus one territory are now certified malaria free.
Rising global numbers are the background against which any malaria prophylaxis decision gets made. The traveller-facing numbers are the ones that should change your behaviour. In the UK, the last full year published by the UK Health Security Agency recorded 2,106 imported malaria cases in 2023, the highest annual total since 2001, against a ten-year mean of 1,504. Six people died.
Those cases are not evenly spread across drugs and destinations. They cluster among people who took nothing.
For the destinations on our list, the CDC names four options wherever malaria prophylaxis is indicated: atovaquone-proguanil, doxycycline, mefloquine and tafenoquine. Which one you get is a prescribing decision, not a shopping choice, and it turns on your medical history, the length of your placement, and how well you cope with a daily versus a weekly tablet.
What the evidence does say clearly is that malaria prophylaxis works. UKHSA's report states that when taken correctly, the agents recommended against falciparum malaria (atovaquone-proguanil, doxycycline and mefloquine) are more than 90% effective. The failure mode is almost never the drug. It is the schedule.
The parasite mix also differs by destination, and it is worth knowing because it shapes both the drug choice and what you will see on the wards:
| Destination | Species mix per CDC | Drug resistance noted |
|---|---|---|
| Tanzania (incl. Zanzibar) | P. falciparum primarily; P. malariae and P. ovale less commonly; P. vivax rare | Chloroquine |
| Indonesia | P. falciparum 60%, P. vivax 40%; P. knowlesi, P. malariae, P. ovale rare | Chloroquine (P. falciparum and P. vivax) |
| Nepal | P. vivax primarily; P. falciparum under 10% | Chloroquine |
| Sri Lanka | No transmission | Not applicable |
Because they never started malaria prophylaxis in the first place. Among UK imported cases in 2023 where the chemoprophylaxis history was known, 667 out of 752 (89%) had taken nothing at all. Only 85 people (11%) had taken any form of prophylaxis, and just 63 of those (8% of the 752) had taken a drug recommended for their destination by the UK Malaria Expert Advisory Group. UKHSA calls that one of the lowest proportions in 23 years.
Adherence is the other half. Of the 63 who took the right drug, adherence was recorded for 34, and 44% of those said they had not taken it regularly. UKHSA notes that self-reported adherence is subject to recall bias, so treat the exact figure with care. The direction is not in doubt.
Planning a placement in Zanzibar, Nepal, Bali or Sri Lanka? travel4med organises supervised clinical placements at all four, and the preparation call covers practical questions like malaria prophylaxis, insurance and what to pack. Book a free consultation or browse our locations.
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Start earlier than feels necessary. Travel clinics book out, some antimalarials need to be started days before departure, and you want a spare few weeks in case the first drug does not suit you. Work through malaria prophylaxis in this order:
Slot all of that into the wider countdown in our medical elective application timeline, so the health appointments do not collide with visa and paperwork deadlines.
No malaria prophylaxis is 100% effective, and in Bali, Pokhara and Galle bite avoidance is doing all the work anyway, because dengue and chikungunya have no tablet at all. The practical list is short: repellent on exposed skin, long sleeves and trousers at dawn and dusk, a net over the bed if the room is not screened, and air conditioning or a fan where you can get it. Anopheles mosquitoes bite mainly between dusk and dawn, which is exactly when you are commuting home from a late shift or eating outside.
Pack the repellent rather than planning to buy it. Our packing list for a clinical internship abroad has the rest, and the travellers' diarrhoea guide covers the other thing that ruins a placement week.
Treat any fever after travel to a malaria area as malaria until a blood test says otherwise, and say where you have been. Malaria can present more than a week after exposure and, with some species, months later. That is why the post-travel part of a malaria prophylaxis course matters and why you should tell any clinician about the trip even if you feel fine now. In one of the six UK deaths in 2023 where the timing was recorded, nine days passed between symptom onset and treatment.
On placement you are surrounded by people who diagnose this for a living, and who will have an opinion on malaria prophylaxis that no website can match. Use them. Ask your supervisor on day one who you would see and where the nearest reliable laboratory is, and put it in your phone. If you want the wider picture of how electives at our sites are structured, start with the medical electives abroad guide.
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