Indonesia is an archipelago of over 17,000 islands with a tropical climate and over 222 million people. Several infectious diseases that occur in Indonesia can be prevented through vaccinations including hepatitis A, hepatitis B, Japanese encephalitis, rabies, typhoid fever, and measles. Malaria is also present and chemoprophylaxis can help prevent it. Travelers should eat and drink safely, prevent bug bites, stay safe outdoors, avoid contact with animals, practice good hygiene, avoid sharing body fluids, know how to access medical care, and use safe transportation to help ensure a healthy trip.