Honest about the risks, and specific about what prevents each one.
Nipah virus
The Government of Canada lists Nipah virus for Bangladesh and says there is no vaccine or medication that protects against it, advising travellers to avoid raw date palm sap, potentially contaminated fruit, and fruit bats. CDC does not raise Nipah on its Bangladesh page — a genuine gap between the two sources, and we would rather show it than quietly drop it.
Prevention Do not drink raw date palm sap, however it is offered — it is a winter speciality and guests are exactly who gets offered it. Do not eat fruit picked up from the ground under trees, and do not handle bats. Mention it to your hosts before you arrive rather than at the table.
Air pollution
The Government of Canada describes smoke haze and other air pollution as at times extremely hazardous in urban areas including Dhaka, typically at its worst in winter, and advises monitoring pollution levels. It is the risk most likely to affect a traveller with asthma, COPD or heart disease.
Prevention Extra reliever inhaler in hand luggage, a well-fitted N95 rather than a cloth mask, and check the daily air quality index. Move outdoor plans to the morning. If someone in the family has asthma, talk to us before the December–February dates are booked.
Traveller’s diarrhoea
The Government of Canada calls it the most common illness affecting travellers, spread person-to-person or through contaminated food and water, with young children, older travellers and people with existing health problems at higher risk. It is the most likely thing to interrupt the trip.
Prevention Bottled or boiled water including for brushing teeth, ice only where you trust the kitchen, food cooked fresh and hot. Rehydration salts weigh nothing and matter most for children and grandparents. We can send you with a standby antibiotic where appropriate.
Dengue
Both sources list dengue for Bangladesh. The Government of Canada notes there is no vaccine or medication available in Canada to prevent it, and that the mosquitoes typically bite during the day — so evening-only precautions miss them.
Prevention Repellent through the day, reapplied. Air-conditioned or screened rooms, and a fan does more than people expect. Empty standing water around the house you are staying in.
Rabies
CDC says dogs infected with rabies are commonly found in Bangladesh, and that rabies vaccines are typically available throughout most of the country if an exposure occurs. The Government of Canada names children among those at higher risk.
Prevention Do not feed or handle street dogs, and keep children away from puppies. Any bite, scratch or lick on broken skin: wash for a full fifteen minutes with soap and running water, and seek medical advice the same day, vaccinated or not.
Avian influenza
The Government of Canada notes human cases of avian influenza have been reported in Bangladesh and advises avoiding contact with birds — wild, farm and backyard, alive or dead — and with surfaces they may have contaminated.
Prevention Stay out of live bird markets and poultry yards, wash hands after any contact, and make sure poultry and eggs are thoroughly cooked.
Roads
The Government of Canada says road conditions and road safety are poor throughout the country and that road travel is dangerous, particularly after dark. Long inter-district drives are how most family trips move around.
Prevention Do not travel by road at night if it can be avoided. Choose the daytime bus or train over the late one, and factor the extra hours into the plan rather than the return leg.
Zika
The Government of Canada lists Zika risk for Bangladesh, spread by mosquito bite and also sexually, and it can cause serious birth defects. It advises using condoms correctly or avoiding sexual contact, particularly during pregnancy.
Prevention If you are pregnant or planning a pregnancy, this deserves a proper conversation before you book rather than after.
Getting treated
The Government of Canada states health care is inadequate and that you will likely need medical evacuation to Singapore or Thailand in case of serious illness or injury, that you may have to pay in advance in cash, and that evacuation can be very expensive.
Prevention Travel insurance with explicit medical evacuation and hospital cover, policy number saved offline. Bring your full trip’s medication in original labelled packaging in your carry-on, with a copy of the prescription — do not plan on refilling anything there.
Monsoon and flooding
The Government of Canada notes that every year during the monsoon a third of the country’s territory is seriously affected, with the rainy season running roughly June to October and flooding a regular consequence. It also notes Bangladesh sits in an active seismic zone.
Prevention Watch the forecast against your travel days rather than the month. Stay out of floodwater — it carries the same infections as untreated water, and cuts and grazes should be covered before you go near it.