Washington (CNN) -- U.S. Secretary of State Hillary Clinton sustained a concussion after becoming dehydrated and fainting, and will no longer testify Thursday before the House Foreign Affairs Committee on the deadly attack on the U.S. consulate in Benghazi, Libya.If a concussion is grade 2 or 3, the person should be kept under strict medical observation. If it is grade one, they can return to work after a few hours.
Clinton had been suffering from a stomach virus at the time, according to a statement on Saturday from Philippe Reines, deputy assistant secretary of state.She is being monitored by doctors and is recovering at home. She was never hospitalized, Reines said."At their recommendation, she will continue to work from home next week, staying in regular contact with Department and other officials. She is looking forward to being back in the office soon," Reines said.