Scientists at Israel’s Weizmann Institute have identified how the HIV virus suppresses the T-cell immune response. It has helped them develop a peptide (small protein) that reduces the severity of Multiple Sclerosis – a disease characterized by an undesirable autoimmune T-cell response.
http://wis-wander.weizmann.ac.il/killer-virus-to-the-rescue#.UvOO4vuSMYl