HIV

CD4 T-Cells: These are white blood cells that play crucial roles in our immune response by signaling other cells to perform their functions during an infection.

Antiretroviral Therapy (ART): A treatment for HIV involving medications that prevent the virus from replicating, thus slowing down disease progression.

Opportunistic Infections: Infections caused by pathogens that take advantage of a weakened immune system, often seen in advanced stages of HIV infection.