Human immunodeficiency virus (HIV) progresses in stages. These stages are based on your symptoms and the amount of the virus in your blood.
Initial stage
Flulike symptoms often appear within 3 to 6 weeks of initial exposure to the virus, although symptoms can develop within just a few days. This first stage is called acute retroviral syndrome. Symptoms of acute retroviral syndrome are often mistaken for symptoms of another viral infection, such as influenza or mononucleosis, and may include:
Abdominal cramps, nausea, or vomiting.
Diarrhea.
Enlarged lymph nodes in the neck, armpits, and groin.
Fever.
Headache.
Muscle aches and joint pain. Skin rash. Sore throat.
Weight loss.