U.S. Secretary of State Hillary Clinton will return to work next week, the State Department said, following a stomach virus that caused her to faint and suffer a concussion, which kept her from her official duties for three weeks. “The secretary (of state) continues to recuperate at home," Philippe Reines, a department spokesman, told reporters by e-mail. “She had long planned to take this holiday week off, so she had no work schedule. She looks forward to getting back to the office next week and resuming her schedule."