Protect yourself from hepatitis A when traveling

Immunization against the hepatitis A virus (HAV) is recommended for anyone traveling to any country or area except:¹

• Australia.
• Canada.
• Japan.
• New Zealand.
• The United States.
• Western Europe and the Scandinavian countries (Norway, Sweden, and Finland).

Talk to your doctor before visiting any other areas.

If you plan to travel to a part of the world where sanitation is poor or where hepatitis A is a known problem, see your doctor about receiving the hepatitis A vaccine, immune globulin (IG), or the combination hepatitis A and B vaccine. (Risk of hepatitis B increases if you go to a high-risk country frequently or stay for a long time.)

• If you complete the hepatitis A vaccination series, it is believed that you will be protected against hepatitis A virus (HAV) for at least 20 years.² In adults (people older than 18 years of age), the first shot should be given at least 4 weeks before a person expects that he or she might be exposed to the hepatitis A virus. A second follow-up shot should be given 6 to 18 months later to prolong protection. (Immunization with hepatitis A vaccine is recommended for all children beginning at 1 year of age. Two separate doses are given at least 6 months apart. The second shot should be given 6 to 18 months after the first shot.)³
• If you receive IG and are planning an extended stay in an area where hepatitis A is a problem, you should get a higher dose of IG. You will need to get additional injections of the same high dose of IG every 3 to 5 months.
• Immune globulin (IG) is made from components of human blood. There is no risk of getting a bloodborne disease from IG made in the United States. The safety of IG manufactured in other countries cannot be guaranteed.
• If you will be visiting countries where hepatitis A is a problem and you will be staying for less than 3 months, you will receive enough protection at a lower cost by choosing the IG injection. However, if you plan to travel abroad on a regular basis, getting the vaccine will save you money in the long run.
• People who are allergic to the components of the hepatitis A vaccine and children younger than 1 year of age should receive IG.

When traveling in an area where hepatitis A is a known problem or where water quality is questionable:

• Boil water before drinking it. Bring the water to a rolling boil for 1 minute. If you are at an elevation of 6562 ft or higher, boil the water for 3 minutes. Do not drink tap water or well water or beverages containing ice cubes.
• Do not brush your teeth with tap water or well water.
• Make sure all foods are cooked well, especially shellfish.
• Eat only raw fruits and vegetables that you have washed in uncontaminated water and peeled yourself.
• Don't swim in water that has not been treated with chlorine.
• Don't drink bath or shower water.

Citations

1. Centers for Disease Control and Prevention (2005). Yellow Book: Health Information for International Travel, 2005–2006. Available online: http://www2.ncid.cdc.gov/travel/yb/utils/ybBrowseO.asp.

2. Craig AS, Schaffner W (2004). Prevention of hepatitis A with the hepatitis A vaccine. New England Journal of Medicine, 350(5): 476–481.

3. Centers for Disease Control and Prevention (2007). Recommended immunization schedules for persons aged 0–18 years-United States, 2007. MMWR, 55(51 and 52): Q1–Q4. Also available online: http://www.cdc.gov/mmwr/pdf/wk/mm5551-Immunization.pdf. [Erratum in MMWR, 56(02): 32. Also available online: http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5602a6.htm.]