HIV infection leads to AIDS, a chronic condition caused by the human immunodeficiency virus that attacks the immune system. Transmission occurs through sexual contact, infected blood, and from mother to child. Initial symptoms resemble the flu, and as the disease progresses, it can cause severe complications, including weight loss and opportunistic infections when CD4 counts drop below 200.

1. HIV Infection
AIDS

2. • Acquired immunodeficiency syndrome (AIDS) is a chronic, potentially
life-threatening condition caused by the human immunodeficiency
virus (HIV) by damaging the cell mediated (T. Cell) immune system of
human body. It is cause by/ sources
• Sexually transmitted infection (STI).
• Infected blood and sharing needles.
• Mother to child during pregnancy, childbirth or breastfeeding.

3. • seven stages of the HIV life cycle.
1) binding,
2) fusion,
3) reverse transcription,
4) integration,
5) replication,
6) assembly,
7) budding

6. signs and symptoms
• HIV develop a flu-like illness within 2 to 4 weeks after the virus enters the body. This illness, known as
primary (acute) HIV infection, may last for a few weeks.
• Possible signs and symptoms include:
• Fever
• Headache
• Muscle aches and joint pain
• Rash
• Sore throat and painful mouth sores
• Swollen lymph glands, mainly on the neck
• Diarrhea
• Weight loss
• Cough
• Night sweats

7. signs and symptoms
latent phase
CD4<200-500
• Persistent Lymph node enlargement and fever
AIDS
CD4< 200
Brain-lymphoma, inflammation,encephalitis, Dementia
• Weight loss
• Oral yeast infection (thrush)
• Shingles (herpes zoster)
• Pneumonia