Overview
Acute HIV infection (also called primary HIV infection or acute retroviral syndrome) is the initial stage of HIV infection. It typically occurs 2 to 4 weeks after exposure to the virus. During this phase, the virus multiplies rapidly in the body, and the immune system mounts a response, often causing flu-like symptoms.
Recognizing acute HIV is crucial because early diagnosis and prompt initiation of antiretroviral therapy (ART) can significantly improve long-term outcomes and reduce the risk of transmission.
Symptoms
Many people with acute HIV infection experience symptoms that may resemble the flu or a viral illness. Common signs include:
- Fever (often high)
- Sore throat
- Rash (often maculopapular)
- Fatigue and malaise
- Swollen lymph nodes (lymphadenopathy)
- Muscle aches (myalgia) and joint pain
- Headache
- Nausea, vomiting, or diarrhea
- Night sweats
Note: Some individuals may have no symptoms at all, which is why testing is essential if you think you may have been exposed.
Causes & Transmission
Acute HIV infection is caused by the Human Immunodeficiency Virus (HIV). The virus is transmitted through contact with infected blood, semen, vaginal fluids, or breast milk. Common routes of transmission include:
- Unprotected sexual contact (vaginal, anal, or oral)
- Sharing needles or syringes
- Mother-to-child transmission during pregnancy, childbirth, or breastfeeding
- Blood transfusions (though rare in countries with screening)
During the acute phase, the viral load is very high, making the person highly infectious.
Treatment
The primary treatment for acute HIV infection is antiretroviral therapy (ART). Early initiation of ART has several benefits:
- Suppresses viral replication and lowers viral load
- Preserves immune function (CD4 count)
- Reduces the risk of disease progression
- Lowers the risk of transmitting HIV to others (U=U)
Additionally, if you think you have been exposed to HIV within the last 72 hours, post-exposure prophylaxis (PEP) may prevent infection. Always consult a healthcare professional for personalized advice.