This information may change. Always check the official source.Last verified: July 2026 by

No vaccinations are required except yellow fever from at-risk countries. Dengue is the main risk, peaking in the November to March monsoon, and rabies is present in Perlis, Kedah, Penang and Sarawak. Tap water is not drinkable. Private hospitals are excellent but expensive, so insurance is not optional.

Health, insurance and where to be treated

  • No mandatory vaccinations to enter, except an international yellow fever certificate when arriving from an at-risk country.
  • Dengue fever is the main risk - a viral illness carried by daytime-active Aedes mosquitoes. The critical period is the monsoon season from November to March, and the only effective protection is regular use of DEET-based repellents.
  • Rabies is present in Perlis, Kedah, Penang and Sarawak - not only on Borneo. Penang matters most here, because it is on the usual tourist route. Avoid stray dogs and monkeys, and treat any bite or scratch as urgent: rabies is effectively always fatal once symptoms appear, and the vaccine course has to start immediately.
  • Tap water is not drinkable. Use bottled or boiled water for drinking and for dental hygiene.
  • Haze between June and October. Forest fires in Indonesia push air pollution up across the region and can disrupt local and regional flights; if you have a respiratory condition, check the Air Pollutant Index before travelling.
  • Private care is top-tier and expensive. Gleneagles Hospital and Prince Court Medical Centre in Kuala Lumpur are excellent, but treatment is financially costly - arrange quality travel insurance in advance.

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