what causes the immune system to not work properly?
HIV lack DDT p53 antibiotics h2o memory cells HPV
A B C D E F G H
HIV, the human immunodeficiency virus, is a retrovirus.
HIV causes the immune system to not work properly
what causes the immune system to not work properly? (A) HIV (B) lack (C) DDT (D) p53 (E) antibiotics (F) h2o (G) memory cells (H) HPV