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 due to poor sanitation practices. Symptoms can include fatigue, nausea, abdominal pain, and jaundice, but many people may not show symptoms at all. Vaccination is an effective way to prevent Hepatitis A, and good hygiene practices, such as handwashing, can reduce the risk of transmission. The virus is generally self-limiting, meaning most people recover fully without long-term effects, although it can be more severe in older adults or those with pre-existing liver conditions.