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Hillary Clinton has previously suffered "the same sort" of illness that saw her abruptly leave this weekend's Sept. 11 memorial, Bill Clinton said Monday.

The Democratic nominee appeared unsteady as she departed Sunday's event. Her campaign said she felt "overheated" and later disclosed she had been diagnosed with pneumonia two days previously.

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"Rarely, but on more than one occasion of the last many, many years, the same sort of thing's happened to her where she got severely dehydrated," Bill Clinton told Charlie Rose in an interview that aired on PBS on Monday. "She’s worked like a demon, as you know, as secretary of state and as a senator and in the years since."

Hillary Clinton was now "doing fine" and " looked like a million bucks [Monday] morning," according to her husband.

Asked if she might be forced to take a longer break from campaigning, he added: "No — not a shot. I'll be lucky to hold her back another day."

Like anyone who’s ever been home sick from work, I’m just anxious to get back out there. See you on the trail soon. -H — Hillary Clinton (@HillaryClinton) September 12, 2016

He said there was "nothing more to know" about her illness and that his wife had merely become dehydrated.

"People faint at my political rallies sometimes and I’m so old I'm sure it's not due to them swooning," he told Rose. "Well over 90 percent of the people I've seen collapse at political rallies, usually it's quite hot, and it's almost always because of dehydration."

Bill Clinton added that his wife's "lifestyle and her underlying indicators, from blood pressure to the amount of exercise to everything else, means she's almost certainly in better health than her opponent."