hiv causes AIDS.
AIDS disrupt the immune system.
T-cells, the generals of the immune system, are white blood cells contaminated by AIDS.
T-cells chemically signal other immune cells to intervene against viruses.
Suddenly, the chain of command of the immune system stops working since tcells are impaired.
AIDS can be latent. A sleepy piece of DNA.
Reverse Transcriptase enzyme results in an ever-changing virus. Hence, hard to target.
Middle Ages, Black plague. 1/3 of Europe dies. Sub-Saharan Africa 20% of adults are infected. Children inherit HIV from birth.