There is Malaria present in Labuan Bajo / Flores.
Gastrointestinal diseases: Make sure you have some rehydration salts and basic medicines on hand. (Consult your doctor regarding appropriate medicines before you go.) Anti-diarrhea medicines like Imodium are best taken only if you have to travel – they only treat symptoms, not causes. Drinking only boiled or otherwise purified water will greatly reduce your chances of stomach troubles. You can read more about drinking water here.
Skin and wound infections: You should clean and treat even small wounds immediately with an antiseptic, and then examine them regularly for signs of infection. Especially if they are coral scrapes, which are notorious for going septic. Keeping wounds dry until healed is also good practice, but it’s a big ask when you’re on a short stay in the islands. Fungal infections love a tropical environment too, so you might want to consider having some antifungal medicine in your first aid kit.
Ear infections: Spending a lot of time with water in your ears in the tropics raises the risk of ear infections, so if you’re concerned pack an appropriate medicine.
Japanese Encephalitis and Dengue Fever: These mosquito-borne diseases have been reported from Flores and are present more or less all over Indonesia and most of South East Asia. You might want to consider vaccination for Japanese Encephalitis. Avoiding mosquito bites is the only protection available against Dengue Fever.
Tropical diseases: All tropical environments harbour parasites and pathogens not found elsewhere. You’re extremely unlikely to come into contact with any of those during a short holiday in Indonesia, but if you suffer any persistent or recurrent symptoms that can’t be diagnosed or aren’t relieved by standard medical treatment – even if those symptoms appear months after your visit – you should consult a tropical diseases specialist.
See our “About” page to know more about prevention of moscuito bites.
For further reading on health: https://www.iamat.org/country/indonesia