What is the human immunodeficiency virus better known as?

The human immunodeficiency virus is widely and commonly known as HIV. This virus specifically targets the immune system by attacking and destroying CD4 cells, which are crucial for immune function. As the disease progresses, it can lead to acquired immunodeficiency syndrome (AIDS), where the body becomes increasingly vulnerable to infections and diseases.

Other choices refer to different viruses. Hepatitis virus primarily affects the liver, causing hepatitis, while influenza virus is responsible for seasonal flu, and herpes virus relates to infections caused by the herpes simplex virus, which typically results in sores and blisters. Therefore, among the options, HIV is the only term that correctly identifies the human immunodeficiency virus.