The Acquired Immune Deficiency Syndrome (AIDS) is caused by a virus know as Human Immunodeficiency Virus (HIV). This virus attacks the immune system (CD4 cells) and exposes an individual to host opportunistic infections.
http://www.researchmoz.us/aids-related-opportunistic-infections-market-global-industry-analysis-size-share-growth-trends-and-forecast-2014-2020-report.html
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