Water
Yes, you can drink the water! Pure and suitable for drinking throughout most of the country. Bottles water is readily available. If your planning a camping trip or a day in the rainforest, load up.
 
Do not eat food purchased from street vendors or food that is not well cooked to reduce risk of infection (i.e., hepatitis A and typhoid fever).

Wash your hands often with soap and water or, if hands are not visibly soiled, use a waterless, alcohol-based hand rub to remove potentially infectious materials from your skin and help prevent disease transmission.

Humans get malaria from the bite of a mosquito infected with the parasite. Prevent this serious disease by seeing your health care provider for a prescription antimalarial drug and by protecting yourself against mosquito bites. Use an insect repellent with DEED.

Injuries

Motor vehicle crashes are a leading cause of injury among travelers. Protect yourself from motor vehicle injuries: avoid drinking and driving; wear your safety belt and place children in age-appropriate restraints in the back seat; follow the local customs and laws regarding pedestrian safety and vehicle speed; obey the rules of the road; and use helmets on bikes, motorcycles, and motor bikes. Avoid boarding an overloaded bus or mini-bus. Where possible, hire a local driver.