Or perhaps the answer lies in the interplay between the
immune system and human genetic variability: Studies have highlighted
genes that strongly influence who is most
susceptible — and who is most resistant — to HIV infection and disease.
And HLA - DQB1 belongs to a family of
genes that regulates proteins critical to the
immune system, particularly important given that extreme living conditions like malnutrition can make people more
susceptible to disease, Yang says.