Your friend tells you that she heard on the radio that HIV infection is not the cause of AIDS. What could you tell your friend.

http://www.mayoclinic.com/health/hiv-aids/DS00005/DSECTION=causes

I read some of the information in the link you provided for me, but I am still uncertain of what I would say.

I suggest you quote some of the article -- like

"How does HIV become AIDS?
HIV destroys CD4 cells — a specific type of white blood cell that plays a large role in helping your body fight disease. Your immune system weakens as more CD4 cells are killed. You can have an HIV infection for years before it progresses to AIDS.

"People infected with HIV progress to AIDS when their CD4 count falls below 200 or they experience an AIDS-defining complication."

Then...

A: I would tell this friend that whichever ratio station she heard this from is evidently false as HIV destroys Helper T cells (CD4 + cell), which are white blood cells crucial to maintaining the function of the human immune system, causing the person infected with the virus to be less equipped to fight against infection and disease, ultimately resulting in the development of AIDS?

Right. You should also cite your source as the highly respected Mayo Clinic.

Thank you.

You're welcome.