HIV is a retrovirus which attacks on immune system. The initial condition associated with HIV infection is flu-like symptoms with rash, decrease in platelets, elevated ESR, increase in CD8+ T-cells, and CD4+ T-cell count is greater than 400 per µl. CD4+ T-cell count less than 200 per µl is AIDS.
Seroconversion that is development of detectable specific antibodies to HIV in the blood serum as a result of infection usually occur within 1-3 months. Thus, flu-like condition with rash is associated with initial condition of HIV infection.