The usual sensible health precautions for life in the tropics
apply to Malaysia: apply sunscreen regularly and generously, avoid
excessive sun and drink lots of water to replace lost fluids in the
humid climate (tap water is potable in KL, but bottled or boiled
water is recommended).
Prevention is much better than cure with mosquito-borne
diseases, so applying strong insect repellent (especially in the
jungle) and wearing clothing that covers your ankles and the back
of the neck and knees at dawn/dusk is recommended. Check with your
healthcare professional for advice regarding any health concerns
you may have.
Heat rash and 'traveller's tummy' from the spicy cuisine are the
two most common issues for tourists, so carrying an antihistamine
cream and digestive aids are advised to overcome these minor
discomforts.
The standard of medical care and facilities in Malaysia is very
good, including several teaching hospitals in KL with Australian
affiliations.