The Hepatitis A virus (HAV) is a highly contagious virus that primarily affects the liver, leading to inflammation and liver dysfunction. It is usually transmitted through the ingestion of contaminated food or water, often in areas with poor sanitation. Symptoms can include fatigue, nausea, abdominal pain, and jaundice, but many people recover fully without long-term effects. Vaccination is an effective way to prevent Hepatitis A, and it is recommended for travelers to regions where the virus is common. Good hygiene practices, such as washing hands thoroughly, can also help reduce the risk of infection.