What virus is HIV?

HIV is the English acronym for the human immunodeficiency virus. AIDS (acquired immunodeficiency syndrome) is widely known; infection with HIV leads to progressive deterioration of the immune system, rendering individuals highly susceptible to various opportunistic infections. During the symptomatic phase of AIDS, even a common cold may become life-threatening. Fortunately, with recent advances in medical care, although HIV infection remains incurable, consistent antiretroviral therapy enables people living with HIV to maintain long-term survival and good quality of life.

What kind of virus is HIV?

AIDS is a severe, life-threatening infectious disease caused by infection with the human immunodeficiency virus (HIV). HIV is a virus that specifically targets and impairs the human immune system. Its primary target is the CD4+ T lymphocytes—key immune cells critical for coordinating the body’s defense responses. By massively destroying these cells, HIV progressively erodes immune function, leaving the body vulnerable to recurrent infections and malignancies, resulting in high morbidity and mortality. The average incubation period of HIV in the human body is approximately 8–9 years. During this asymptomatic latent phase, infected individuals may remain symptom-free and continue normal daily activities—including work—for many years.

Symptoms of HIV infection

1. General symptoms

Persistent fever, generalized weakness, night sweats, and widespread, persistent lymphadenopathy—particularly prominent in the cervical, axillary, and inguinal regions. Affected lymph nodes are typically ≥1 cm in diameter, firm yet mobile, and non-tender. Unintentional weight loss may exceed 10% within three months—and in severe cases reach up to 40%—resulting in marked emaciation.

2. Respiratory symptoms

Chronic cough, chest pain, dyspnea, and, in advanced cases, hemoptysis.

3. Gastrointestinal symptoms

Decreased appetite, anorexia, nausea, vomiting, diarrhea, and, in severe cases, bloody stools. Diarrhea associated with HIV infection is often refractory to standard antimicrobial therapies used for routine gastrointestinal infections.

4. Neurological symptoms

Dizziness, headache, slowed mental processing, cognitive decline, psychiatric disturbances, seizures, hemiparesis, and dementia.

5. Skin and mucosal manifestations

Herpes simplex virus infection, herpes zoster (shingles), and oral or pharyngeal mucositis with ulceration.

6. Malignancies

Multiple cancers may develop. Kaposi sarcoma—a common HIV-associated malignancy—often presents on the skin as red or violaceous macules, papules, or infiltrative plaques.

The above provides an overview of what HIV is and its associated clinical features.We hope this information has been helpful. Wishing you good health and happiness.