Noun
immune deficiency (plural immune deficiencies)
Alternative form of immunodeficiency
Aids is Acquired Immune Deficiency Syndrome. I don't believe it's a sensible thing to ask: 'Does a virus cause a syndrome?' It can't. A virus will cause a disease. The syndrome is a group of diseases as a result of immune deficiency. As a result of immune deficiency you suffer various diseases. Thabo Mbeki