Hepatitis A is a highly contagious liver infection caused by the hepatitis A virus. It is typically spread through contaminated food or water, or close contact with an infected person. Symptoms of hepatitis A can vary from mild to severe and may include fatigue, fever, nausea, vomiting, abdominal pain, dark urine, and jaundice (yellowing of the skin and eyes). Hepatitis A can be prevented through vaccination and good hygiene practices such as washing hands regularly and avoiding contaminated food and water. Treatment for hepatitis A usually involves supportive care to manage symptoms and allow the liver to heal on its own.