Jacques Leibowitch (1 August 1942 – 4 March 2020) was a French medical doctor and clinical researcher known for his contributions to the knowledge and treatment of HIV and AIDS, starting with his initial designation of a human retrovirus as the cause of AIDS, and his ground-breaking use of triple combination therapy for the effective control of HIV in the patient. A practicing physician in the infectiology department of the Raymond Poincaré University Hospital of Garches (directed by Prof. Christian Perronne, AP-HP), University lecturer Emeritus, he led the treatment program ICCARRE that proposes a dramatic reduction of weekly anti-HIV drug intake, down to 2-3 anti-viral pills a day taken 2 to 3 or 4 days a week, as opposed to the presently recommended seven days a week, as still universal