Do those with severe immune deficiency, like people with HIV, have a smaller chance of developing an advanced MPB? This is a question that struck me, since the immune system is what eventually attacks/kills the hair follicles if sensitive to DHT?
To understand the immune system and how it affects one’s HIV status and balding, it would take a few pages to elaborate. So to put it simply, the answer to your question is no.
The immune system does not attack and “kill” the hair follicles sensitive to DHT. Your statement is not correct. Hair loss from immune system issues reflect many forms of the autoimmune disease groupings, such as alopecia areata, but the immune system issues regarding HIV and alopecia areata are not related since the target of the antibodies are different, as well as the cause of the disease.
If you have HIV and have the genes for hair loss, you will have HIV and have hair loss (which will almost certainly accelerate if your HIV gets out of control or your diet is not healthy).