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Health Information for Travelers to TongaClinician View

Map - Tonga

Vaccines and Medicines

Prepare travelers to Tonga with recommendations for vaccines and medications.


  Recommendations Transmission Guidance
Routine vaccines

Recommended for all travelers


Immunization schedules

Hepatitis A

Recommended for most travelers, including those with "standard" itineraries and accommodations

Fecal-oral route (contaminated food and water)

Person-to-person contact

Hepatitis A (Yellow Book)

Dosing info

Hepatitis B

Consider for most travelers; recommended for those who might be exposed to blood or other body fluids, have sexual contact with the local population, or be exposed through medical treatment (e.g., for an accident).

Contact with blood and other body fluids:

  • Unprotected sex
  • Injection drug use
  • Contaminated transfusions
  • Exposure to human blood
  • Contaminated tattoo and piercing equipment

Hepatitis B (Yellow Book)

Dosing info


Recommended for most travelers, especially those who are staying with friends or relatives; visiting smaller cities, villages, or rural areas where exposure might occur through food or water; or prone to "adventurous eating"

Fecal-oral route (contaminated food and water)

Typhoid (Yellow Book)

Dosing info (Yellow Book)



Patient Counseling

Counsel your patients on actions they can take on their trip to stay healthy and safe.

Eat and drink safely

Counsel travelers to be diligent about food and water precautions:

  • Avoid cooked food served at room temperature.
  • Avoid raw food, including raw vegetables unless they can be washed thoroughly.
  • Drink only beverages from sealed bottles or cans.
  • Water is safe if it has been boiled or chemically treated.
  • Avoid ice unless made from bottled/disinfected water.

Consider prescribing an antibiotic for self-treatment of travelers’ diarrhea, factoring in resistance issues at the destination.

Additional Resources

Food & Water Precautions (YB)
Water Disinfection for Travelers (YB)
Food Poisoning from Marine Toxins (YB)
Travelers’ Diarrhea (YB)
Persistent Travelers’ Diarrhea (YB)


Prevent bug bites

Counsel travelers to be diligent in insect precautions:

  • Cover exposed skin.
  • Use an appropriate insect repellent. (see below)
  • Use permethrin-treated clothing and gear (such as boots, pants, socks, and tents). Travelers can buy pre-treated clothing and gear or treat them at home. Treated clothing remains protective after multiple washings. Permethrin should NOT be used directly on skin.
  • Stay and sleep under in air-conditioned or screened rooms.
  • Use a bed net if sleeping area is exposed to the outdoors.
More Information on Insect Repellents

DEET (concentration of 20% or more) is the only insect repellent shown to be effective against ticks. However, several EPA-registered active ingredients provide reasonably long-lasting protection against mosquitoes:

  • DEET (chemical name: N,N-diethyl-m-toluamide or N,N-diethyl-3-methyl-benzamide): Concentrations above 50% show no additional protective benefit.
  • Picaridin (KBR 3023 [Bayrepel] and icaridin outside the United States; chemical name: 2-(2-hydroxyethyl)-1-piperidinecarboxylic acid 1-methylpropyl ester): Must be reapplied more often than DEET.
  • Oil of lemon eucalyptus (OLE) or PMD (chemical name: para-menthane-3,8-diol), the synthesized version of OLE. “Pure” oil of lemon eucalyptus (essential oil) is not the same product; it has not undergone similar testing for safety and efficacy, is not registered with EPA as an insect repellent, and is not covered by this recommendation.
  • IR3535 (chemical name: 3-[N-butyl-N-acetyl]-aminopropionic acid, ethyl ester).

Products with <10% active ingredient may offer only limited protection (1–2 hours).

Encourage patients to use repellents and reapply only as instructed. If sunscreen is also needed, they should apply sunscreen first and repellent second. Encourage them to follow package directions for using repellent on children and avoid applying to their hands, eyes, and mouth.

For more detailed information, visit the Yellow Book: Protection against Mosquitoes, Ticks, & Other Insects & Arthropods

Additional Resources

Stay safe outdoors

Advise travelers to exercise caution during outdoor activities. Important tips include dressing appropriately for the climate (such as loose, lightweight clothing in hot climates and warm layers in cold climates), staying hydrated, avoiding overexposure to the sun, and practicing safe swimming habits. To avoid infection while swimming, travelers should not swallow water when swimming and avoid contact with water that may be contaminated from poor sanitation.

Encourage travelers to learn basic first aid and CPR before travel, especially if they will be traveling to remote areas where medical assistance may not be accessible. Help them assemble a travel health kit.

Additional Resources:

Problems with Heat & Cold


Keep away from animals

Counsel travelers to be cautious around all animals.

  • Travelers should avoid touching, petting, handling, or feeding animals, including pets.
  • Arthropods such as spiders and scorpions can pose a stinging risk, and travelers should exercise care in environments where these creatures are likely to be present.
  • Stress the urgency of treating suspected and probable rabies infection by:
    • Washing the wound immediately with soap and clean water.
    • Seeking medical attention as soon as possible.
  • Travelers at risk for rabies should consider medical evacuation insurance, since postexposure prophylaxis may not be available at the destination.
Additional Resources

Animal-Associated Hazards (YB)
Rabies (YB)
Criteria for Preexposure Immunization for Rabies (YB)
Protection against Mosquitoes, Ticks, & Other Insects & Arthropods (YB)



Reduce your exposure to germs

People who are ill should not travel. Urge travelers to practice hand hygiene and sneeze into a tissue or their sleeve.


Avoid sharing body fluids

Counsel travelers on the risks of diseases associated with the exchange of saliva, blood, vomit, semen, urine, and feces.

Travelers should:

  • Use a latex condom correctly every time they engage in sex (vaginal, anal, and oral-genital).
  • Not inject drugs.
  • Limit alcohol consumption.
  • Not have tattoos, piercings, or other procedures that use needles (acupuncture) unless the needles are packaged new or sterilized.
  • Ensure that medical and dental equipment is sterile or disinfected if seeking care.
Additional Resources:
Hepatitis B (YB)
Hepatitis C (YB)
Medical Tourism (YB)


Know how to get medical care while traveling

Travelers should plan for how to obtain health care during their trip, should the need arise.

Discuss supplemental travel health insurance and medical evacuation insurance, and consider helping the traveler obtain an extra month of prescriptions for any needed medications.


Select safe transportation

Motor vehicle crashes are the #1 killer of healthy US citizens in foreign countries.

Most recommendations for safe transportation are basic and could be considered common sense. However, travelers often do not think about the importance of being aware and careful when walking, riding, driving, or flying.

In many places cars, buses, large trucks, rickshaws, bikes, pedestrians, and even animals share the same lanes of traffic, increasing the risk for crashes.

Counsel travelers to think about transportation options before they arrive, especially if they will be driving in Tonga.

Medical Evacuation Insurance

If your patient is seriously injured, emergency care may not be available or may not meet US standards. Trauma care centers are uncommon outside urban areas. Encourage patients to purchase medical evacuation insurance.

Some basic reminders to review with your patients:

  • Choose safe vehicles and avoid motorbikes when possible.
  • Wear a seatbelt or a helmet at all times.
  • Do not drive after drinking alcohol or ride with someone who has been drinking.
  • Avoid driving at night; street lighting in certain parts of Tonga may be poor.
  • If they will be driving, remind them to get any driving permits and insurance they may need. It is recommended to get an International Driving Permit (IDP).
  • Avoid using local, unscheduled aircraft, and fly on larger planes (more than 30 seats) when possible.
Helpful Resources

Road Safety Overseas (Information from the US Department of State): Includes tips on driving in other countries, International Driving Permits, Auto Insurance, and other resources.

The Association for International Road Travel has country-specific Road Travel Reports available for most countries for a minimal fee.

Remind your patients that traffic flows on the left side of the road in Tonga. Encourage them to pay close attention to the flow of traffic, especially when crossing the street.


Maintain personal security

Travelers should be reminded on how to protect their personal safety during travel, regardless of their destination. 

The US Department of State has an extensive website with safety information for international travelers, travel alerts and warnings, and country-specific information. Travelers should be directed to the Department of State resources for information and tips on safe travel.

Stay abreast of current events, particularly those that could pose a safety or health problem for travelers. You can also receive updates on new travel alerts and warnings from the US Department of State by subscribing to their RSS feeds.




Healthy Travel Packing List

Remind your patients to pack health and safety items. Use the Healthy Travel Packing List for Tonga for a list of health-related items they should consider packing.



Travel Health Notices

Stay aware of current health issues in Tonga in order to advise your patients on additional steps they may need to take to protect themselves.

Watch Level 1, Practice Usual Precautions



Advising Returning Travelers

Although some illnesses may begin during travel, others may occur weeks, months, or even years after return. A history of travel, particularly within the previous 6 months, should be part of the routine medical history for every ill patient. A newly returned, ill international traveler should be preferentially evaluated by a physician versed in travel-related illness.

Here are two professional medical organizations that provide directories of travel clinics throughout the United States:

For more information on advising patients after international travel, see Yellow Book Chapter 5: Post-Travel Evaluation.


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