Where does HIV reproduce?

Where does HIV reproduce?

• A. In the bloodstream
• B. In the stomach lining
• C. Inside our white blood cells
• D. In the liver

Answer: (C)

Viruses only multiply by hijacking a living cell, and HIV specifically uses immune cells to do its copying. It targets white blood cells, especially CD4+ T cells, binding to the CD4 receptor with the help of co-receptors like CCR5 or CXCR4. Once inside, the virus uses the cell’s machinery to replicate: reverse transcribing its RNA into DNA, integrating that DNA into the cell’s genome, and then making viral proteins and new viral RNA. These pieces are assembled into new virus particles that bud out to infect more cells. This replication inside the cell is why HIV is described as reproducing inside white blood cells—not in the bloodstream as free virus, nor primarily in the stomach lining or liver. The bloodstream may carry virus particles, but the actual production happens inside the infected white blood cells, particularly in lymphoid tissues where these cells reside.

Viruses only multiply by hijacking a living cell, and HIV specifically uses immune cells to do its copying. It targets white blood cells, especially CD4+ T cells, binding to the CD4 receptor with the help of co-receptors like CCR5 or CXCR4. Once inside, the virus uses the cell’s machinery to replicate: reverse transcribing its RNA into DNA, integrating that DNA into the cell’s genome, and then making viral proteins and new viral RNA. These pieces are assembled into new virus particles that bud out to infect more cells. This replication inside the cell is why HIV is described as reproducing inside white blood cells—not in the bloodstream as free virus, nor primarily in the stomach lining or liver. The bloodstream may carry virus particles, but the actual production happens inside the infected white blood cells, particularly in lymphoid tissues where these cells reside.