The Hepatitis E virus (HEV) is a virus that primarily affects the liver, leading to inflammation known as hepatitis. It is mainly transmitted through contaminated water, making it more common in areas with poor sanitation. Symptoms can include fatigue, jaundice, and abdominal pain, but many people recover without treatment. HEV is particularly concerning for pregnant women, as it can lead to severe complications. There are vaccines available in some countries, but they are not widely used globally. Preventive measures focus on improving water quality and hygiene practices to reduce the risk of infection.