WASHINGTON (AP) — Secretary of State Hillary Rodham Clinton returned to work on Monday, after a month-long absence caused first by a stomach virus, then a fall and a concussion and finally a brief hospitalization for a blot clot near her brain.

Clinton presided over a senior staff meeting, the first she has convened since early December before contracting the stomach bug after returning from a trip to Europe on Dec. 7.

The illness forced her to cancel a planned visit to North Africa and the Middle East and left her severely dehydrated. While at home, she fainted, fell and suffered a concussion that was diagnosed by doctors on Dec. 20. During a follow up exam on Dec. 30, doctors discovered a blood clot in a vein that runs between the skull and brain.