Typhoid

Typhoid fever is linked to the salmonella species known as Salmonella typhi. Common symptoms are fever muscle aches, nausea, abdominal pain and problems with the stool (diarrhea or constipation). The salmonella is transmitted by contaminated food or water. People can transmit the disease without knowing that they have it.

Vaccination is recommended and strongly recommended if you stay longer and wish to eat street food and travel to more remote areas.

Hepatitis A

Hepatitis A vaccine is recommended for travellers to developing countries which also includes Indonesia and Bali. Hepatitis A is a viral infection of the liver. Like typhoid-fever, it is also transmitted by contaminated water and food. It might also be acquired by direct contact with infected people. Symptoms are usually fever, nausea, vomiting and pain in your abdomen, and could even lead to severe cases.

Vaccination is recommended

Tetanus Diphteria

Basic Standard everybody should have anyway. Last immunization should not be older than ten years.

Vaccination is strongly recommended

Rabies

Recent outbreaks of rabies in 2008 and 2010 raised concerns among travellers to Bali. A rabies vaccination is not all that necessary if you come to Bali. Still, because dogs (and monkeys) who would often interact with tourists can carry rabies, and Bali’s dog population being estimated at 500.000, getting the vaccine may not a bad thing before coming here.

Vaccination slightly recommended

Malaria

The general risk to catch malaria in Bali is very small. Bali is categorized as a “low to no risk” destination for Malaria. Best protection is still not to get bitten by mosquitoes. Make use of mosquito nets, wear long sleeves, and long trousers when you take a jungle hike for example.

Low risk, vaccine not available, prophylaxis not necessary

Dengue Fever

The most imminent health hazard to Balinese and visitors after traffic accidents is most likely Dengue fever. There is currently no vaccine against it, Dengue fever is a flu-like illness and not uncommon in Bali. Like Malaria, Dengue is transmitted by a certain type of mosquito — the Aedes Mosquito is responsible for Dengue bites, primarily in daytime but also during nighttime. They are found mainly in densely populated areas, like the capital Denpasar. The disease is observed all year-round; it can be very painful, and can, in some cases, be fatal. Therefore the best way to prevent Dengue is to avoid getting bitten by mosquitoes.

Main symptoms, besides a fever, include aching joints and muscles, vomiting, severe headaches, nausea. Usually, it takes a few days for the symptoms to subside, barring any complications. If one gets their first Dengue infection as an adult, most likely, one will not experience great difficulties. For patients who are diagnosed with a Dengue infection a second time as adults risk higher complications.

No vaccine available, general mosquito bite precautions.

Diarrhea (Bali Belly)

In Bali, Montezuma’s revenge is most commonly known as a phenomenon called Bali Belly. Globally, the number one travel-related disease is mainly due to hygiene reasons in contaminated water and food. It’s a good thing to bring some of the available anti-diarrheal drugs along when traveling – just in case. Although diarrhea is, in most cases, not dangerous but if symptoms persist for more than three days (72h), then go to a doctor. Also, if you experience within 8 hours three more loose stools, vomiting, strong cramps, blood in the stool and fever, then you might need antibiotics.

Medium risk, don’t drink tap water, be careful with street food

HIV

Bali has a lot of prostitution. Some studies suggest that HIV is widespread among the prostitutes. There are several other sexually transmitted diseases (STD) that are not uncommon among working girls (and boys) which will be difficult to explain back home.

Be cautious and conscious.

Yellow Fever

Vaccination not required generally for Bali

Only required for travelers arriving from yellow-fever infected countries (Africa, Americas)