US Secretary of State Hillary Clinton
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Hillary Clinton 'thrilled to be back' after health scare

US Secretary of State Hillary Clinton has said she is "thrilled to be back" at work after spending a month recuperating from a series of ailments.

Mrs Clinton was treated in a New York hospital in early January for a blood clot between the skull and the brain.

In December she fell and suffered a concussion after she became dehydrated as a result of a stomach virus.

Mrs Clinton, 65, is due to stand down in the near future and Massachusetts Senator John Kerry has been nominated to replace her as America's top diplomat.

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