 When he injured his head at the 1988 Seoul Olympics and some blood got in the pool, Louganis said he was "paralyzed with fear" that someone might catch the virus, but no-one did.The incident posed no risk to others as any blood was fully diluted by the pool water, and according to John Ward, chief of HIV-AIDS surveillance at the U.S. Centers for Disease Control and Prevention, "chlorine kills HIV".Also, since skin is a very effective barrier to HIV, the only way the virus could enter would be through an open wound.