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There have not been cases of malaria recorded on Phangan Island. The resort has a pest control program in operation and for that reason the population of mosquitoes is rather low on our property. If you are concerned then you may wish to apply an insect repellent.
If you intend to spend a lot of time in the northern regions of Thailand where malaria is more common you should consult your doctor or local health authority for advice re anti-malarial medications.