Risk factors associated with human immunodeficiency virus infection in blood donors in Iran: A case-control study.

Background: Despite setting the stringent criteria for the selection of safe donors, some human immunodeficiency virus (HIV)-positive volunteers manage to give blood. Considering the window period of screening tests, this could endanger the safety of blood supply.

Materials And Methods: A frequency match case-control study was conducted on HIV-positive and negative blood donors in Iran from 2007 to 2008.