When infected with the human immunodeficiency virus (HIV), this illness can sometimes develop into acquired immunodeficiency syndrome (AIDS). More than 1 million Americans are infected with HIV/AIDS, and the Centers for Disease Control estimate that 21 percent of them are unaware of it. There is no cure or vaccine for HIV/AIDS, but it can be managed through proper medication and a healthy lifestyle. HIV/AIDS, Second Edition describes the symptoms, diagnosis, treatment, and prevention of HIV/AIDS, the newest research in the field, and future prospects for controlling the disease.