Hepatitis A is a viral infection that primarily affects the liver, causing inflammation and potentially leading to symptoms like fever, nausea, and jaundice (yellowing of the skin and eyes). The virus is commonly transmitted through consuming contaminated food or water. While hepatitis A can occur anywhere, the risk of contracting it increases significantly when traveling abroad, especially to regions with poor sanitation and hygiene practices. Tourists may unknowingly consume contaminated food or water, putting them at risk of infection. It is crucial for travelers to be aware of the risk and take preventive measures, such as getting vaccinated against hepatitis A, to protect themselves during their journeys.

The typical dosing for the hepatitis A vaccine involves a two-dose series. The first dose is administered before potential exposure to the virus, and the second dose is given 6 to 18 months later to provide long-term immunity. For a booster dose, a single shot is usually recommended for ongoing protection after the initial series. Ensuring full vaccination with the recommended dosing schedule is essential to prevent hepatitis A infection and maintain immunity, especially when traveling to regions with a higher risk of the disease.