HIV
virus is a retro-virus composed of two (2) strands of RNA which
accesses the human body via blood, semen, and vaginal secretions
and occasionally through body fluids and contaminated sharps. It’s
viral protein gp120 locks on with T4 lymphocytes and viral replication
starts immediately thereafter and dissemination occurs through circulatory
and lymphatic system and results in acute HIV disease within 2-3
weeks and CD4 (T4 lymphocytes) count drops down temporarily but
significantly and due to intense immune response to the host, CD4
count bounces back a little later but not up to the previous level.
In due course, the CD4 count drops down gradually and viral load
(RNA copies) increases correspondingly.