Patient Kim Nguyen is seen at National Institute of Health in Bethesda, Md., Wednesday, Aug. 22, 2012.  Researchers have identified a mysterious new disease that has left scores of people in Asia and some in the United States with AIDS-like symptoms even though they are not infected with HIV. The patients' immune systems become damaged, leaving them unable to fend off germs as healthy people do. Kim Nguyen, 62, a seamstress from Vietnam who has lived in Tennessee since 1975, may have been in danger of that when she first sought help for a persistent fever, infections throughout her bones and other bizarre symptoms in 2009. She had been sick off and on for several years and had visited Vietnam in 1995 and again in early 2009. (AP Photo/Pablo Martinez Monsivais)
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