Immunization against the hepatitis A virus (HAV) is recommended for anyone traveling to any country or area except:1
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.)
When traveling in an area where hepatitis A is a known problem or where water quality is questionable:
Citations
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.
Craig AS, Schaffner W (2004). Prevention of hepatitis A with the hepatitis A vaccine. New England Journal of Medicine, 350(5): 476–481.
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.]
WebMD Medical Reference from Healthwise