January 4, 2006 - Is admitted to Hadassah University Hospital in Jerusalem after suffering a significant stroke and is under anesthesia and on a respirator. Power is transferred to Vice Premier Ehud Olmert.
February 11, 2006 - Doctors remove approximately 20 inches of intestine after a lack of blood flow had caused his the area to become gangrenous. Sharon remains comatose and in critical but stable condition.
April 11, 2006 - The Israeli Cabinet declares Sharon permanently incapacitated, formally ending his term as prime minister.
May 28, 2006 - Is transferred from Hadassah Hospital to a long term care facility, Tel HaShomer Hospital in Tel Aviv.
November 3, 2006 - Is transferred to the intensive care unit of Sheba Hospital.
October 2011 - His condition is described as "coma-like" or "near-coma," with "'minimal consciousness" and some response to external stimuli.
January 28, 2013 - Tests show "significant brain activity," where Sharon's brain appeared to respond when doctors showed him pictures of his family and had him listen to his son's voice.