WASHINGTON, D.C. -- Scientists are reporting cases of a mysterious illness that acts like AIDS, even though patients are not HIV positive.
Most cases have been in Asia, but a few have been reported in the United States.
At this point, scientists do not believe it runs in families or is contagious. Doctors say it appears to be a form of adult-onset acquired immune deficiency.
Patients often suffer from infections and some have died. The illness is sometimes mistaken as tuberculosis.
This research is from the National Institute of Allergy and Infectious Diseases, and is published in the New England Journal of Medicine.