Opportunistic infections and diseases occur in people whose immune systems have been weakened. They usually do not occur in people who have healthy immune systems. When the immune system is weakened by a disease such as HIV infection, opportunistic diseases may cause serious, even life-threatening, illnesses.
Opportunistic infections that are common in people who have AIDS include:
ByHealthwise Staff Primary Medical ReviewerE. Gregory Thompson, MD - Internal Medicine Brian O'Brien, MD, FRCPC - Internal Medicine Adam Husney, MD - Family Medicine Specialist Medical ReviewerPeter Shalit, MD, PhD - Internal Medicine, Infectious Disease