Hepatitis A virus (HAV) is associated with which disease?

Hepatitis A virus (HAV) is specifically associated with Hepatitis A, which is a viral infection that primarily affects the liver. This disease is characterized by inflammation of the liver, leading to symptoms such as fatigue, abdominal pain, nausea, and jaundice. Hepatitis A is transmitted through the fecal-oral route, often through contaminated food or water, and is preventable through vaccination.

In the context of other choices, while diarrhea can occur during Hepatitis A infection due to compromised liver function and gastrointestinal involvement, it is not the primary association. Malaria is a completely unrelated disease caused by a different type of parasite and is not linked to HAV. Fever can be a general symptom of many infections, including viral infections, but again, it does not specifically associate with Hepatitis A in the same direct manner as the disease itself. Thus, Hepatitis A is the most accurate and direct correlation to HAV, confirming it as the correct answer.