Always remember to check the expiration dates on all medications, whether they are from home or abroad. Safety Information Travelers Diarrhea. Food and waterborne diseases are the number one cause of illness in travelers. Travelers diarrhea can be caused by viruses, bacteria, or parasites, which are found throughout the region and can contaminate food or water. Make sure your food and drinking water are safe.
Malaria is a preventable infection that can be fatal if left untreated.
Prevent infection by taking prescription antimalarial drugs and protecting yourself against mosquito bites. Malaria risk in this region exists all year in some cities and all rural areas of these countries, except for Brunei Darussalam and Singapore. For specific locations, see Malaria Information for Travelers to Southeast Asia. Most travelers to Southeast Asia at risk for malaria should take mefloquine to prevent malaria. Yellow Fever Vaccination Certificate.