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Malaria: an answer by district, not by shrug

Most destination health advice says “certain areas” and leaves you to guess which ones. The CDC does something better for Botswana: it names the districts. That matters for the Okavango, because your answer changes depending on which part of the country you spend time in — and because a Delta camp and a Gaborone hotel are not the same malaria question.

The Delta sits inside the transmission group, along with Chobe, Ngamiland and most northern safari country. The parasite is mainly Plasmodium falciparum, with P. malariae, P. ovale and less commonly P. vivax also present. Chloroquine resistance means the old first-line drug is no longer useful here, which is why the current list matters.

Transmission grouping per the CDC Botswana traveller guidance, updated April 2025. Season shifts the level of risk but not the grouping.

The practical version: bring the list of camps, lodges and towns you will actually visit to your travel doctor, not the word “Botswana”. Two districts apart can carry opposite recommendations.

The four drugs, and the timing that catches people out

Which drug you should take is a prescription decision involving your medical history and the interactions with everything else you take. What is worth knowing in advance is that the start dates differ by weeks. Mefloquine has to be running before you fly, and the commonest way a course fails is not the drug but the three-week run-up skipped because the flight was booked late.

Finish the post-travel course even if you feel entirely well. Malaria has a long runway, and an incomplete course is a way of arranging to get sick at home.

Drugs first, then the parts that are not medical. Anopheles mosquitoes here feed at dusk and through the night, so the measures that work are the ones you keep to: DEET-based repellent reapplied through the day, long sleeves and trousers at dawn and dusk, an intact treated net over the bed, and permethrin-treated clothing. Prophylaxis is not a substitute for any of it.

The one that is not malaria: bilharzia

Mokoro is a very quiet way to put your arms, legs and lower body into warm freshwater for an hour. It is also, on a specific and well-documented map, an exposure to a parasite. Schistosomiasis — bilharzia — is transmitted by freshwater snails, and the larvae penetrate skin that has touched contaminated water.

In Botswana the picture is local: Schistosoma mansoni is present in the North-West District, particularly along the Okavango River and its marshlands and in the villages along the Chobe River, while S. mansoni and S. haematobium are reported in the Limpopo valley. Among the places where localised risk has been reported are Maun, Kavimba, Kasane and Pandamatenga — which is to say the places a Delta trip actually touches. The Kalahari districts of Kgalagadi and Ghanzi are rated free of risk.

Most infections produce no obvious symptoms, which is precisely what makes them easy to file under nothing. Where symptoms come, an itchy rash appears where the larvae entered; between four and eight weeks later a fever, cough, diarrhoea or muscle aches can follow. Untreated, the eggs damage the bladder, kidneys, bowel or liver over years, and the damage is not reversible. Praziquantel is an effective treatment.

The one piece of advice that saves people the most trouble: get assessed no sooner than two months after you come out of the water. Not a fortnight. The parasite cannot be reliably detected earlier than that, so testing too soon returns a false negative, the traveller concludes they are fine, and years later something gets found. It is not a reason to skip mokoro — it is a reason to put a two-month note in your diary and go and be seen.

The certificate that catches people out

Yellow fever is not a Botswana risk — the vaccine is not recommended for travellers coming directly from countries with no transmission. The entry rule is about arrival, and it is applied at the border by Port Health at Maun and Kasane just as much as at Gaborone.

If you arrive from a country where yellow fever is transmitted — or you transit one for more than twelve hours, including inside the transit zone — you must be able to produce an international certificate of vaccination. Three details make this a pre-departure chore rather than an airport problem: the vaccine needs ten days to become effective, it must be issued by an approved travel clinic rather than an ordinary doctor’s surgery, and it is a physical yellow card. Photocopies and phone photographs are not accepted.

Beyond that, the recommended vaccines are unglamorous and worth doing: hepatitis A for most travellers, typhoid for longer stays and rural areas, hepatitis B and rabies where there is blood, body-fluid or animal contact, and routine checks on MMR, polio and tetanus-diphtheria. Book the travel clinic four to six weeks out — vaccines with a run-up need the calendar, and the difference between a rushed appointment and a useful one is bringing your itinerary.

If something goes wrong: how the evacuation chain actually works

This is the part of a Delta trip worth understanding before you are in it. A premium camp on an island concession is reached by light aircraft, has a small permanent staff and the nearest advanced hospital is a fixed-wing flight away in Maun. Botswana’s health system is good in the towns and much thinner in the bush, and the sentence that governs everything else is the one that follows it: seriously ill travellers are likely to need medical evacuation.

For the Delta and the Kalahari, that evacuation is usually Okavango Air Rescue. It is the only helicopter rescue service operating in those wilderness areas with medical staff aboard, which is a much narrower claim than “air ambulance in Africa” and the reason it exists at all. In 2024 it flew an average of five rescues a month at roughly USD 3,000 per mission, and the operating model is a patronage membership rather than fee-for-service — the Swiss REGA model — because an operation like that cannot be funded by the calls it answers.

Here is the part most insurance pages will not tell you. OAR’s own position is that holding insurance does not by itself guarantee access to the helicopter and the medical team. Access is arranged through membership, and in practice some camp and lodge groups enrol their guests automatically as part of the rate while others expect you to arrange it. So the questions are specific: does my policy name medical evacuation and hospital treatment, does it pay the facility directly or reimburse me afterwards, and has the camp confirmed that its guests are covered with this particular operator this season?

Botswana also expects private facilities to ask for proof of insurance or immediate payment in cash, so carry the policy number somewhere you can read it without a signal. And ask the camp, not the agent — with a light-aircraft transfer involved, the answer to “how long until I am in a hospital?” is a fact about that property, not about the country.

What actually goes wrong, in rough order of frequency

Malaria and bilharzia dominate the health advice because they are the two diseases you cannot self-diagnose from a bed in a camp. The rest is ordinary and preventable, and the list below is the one worth reading on the plane.

Traveller’s diarrhoea and typhoid come from water and food, so the rule is bottled or boiled water including for brushing your teeth, and a preference for things cooked in front of you. Leptospirosis comes from contact with urine-contaminated water or mud, which in a flooded delta is worth bearing in mind — avoid wading through standing water you cannot see the bottom of. Dengue and African tick-bite fever come from bites, so the same repellent discipline covers them. Ticks are real after a day in long grass; do a check in the evening.

Then the road. Driving after dark is named as a cause of fatal accidents in Botswana, because the animals are on the road and the game-viewing vehicle is not the thing that moves fastest at night. Everything else follows from that: no walking or driving at night in ways your camp has not authorised, no touching or feeding animals, and a wound treated properly and promptly rather than left dirty. There is no chemprophylaxis or vaccine for any of this — it is the behaviour that does the work.