Brian has been exhausted lately and keeps getting sick. He finally goes to the hospital because he can't get over a common cold. While in the hospital, the doctors realize that he has pneumonia and find a yeast infection in his blood. They also determine that his white blood cell counts are extremely low.Which STD/STI might Brian have?
A. HIV/AIDS
B. Syphilis
C. HPV
D. Chlamydia/PID