Hepatitis A is a highly contagious liver infection caused by the hepatitis A virus (HAV). It is primarily spread through consuming contaminated food or water, often in areas with poor sanitation. Symptoms can include fatigue, nausea, abdominal pain, and jaundice, which is a yellowing of the skin and eyes. Most people recover fully within a few weeks without long-term liver damage. A vaccine is available to prevent hepatitis A, making it important for travelers to areas where the virus is common. Good hygiene practices, such as handwashing, can also help reduce the risk of infection.