NEW YORK _ Democratic presidential candidate Hillary Clinton, who abruptly left Sunday's 9/11 ceremony in lower Manhattan, had been diagnosed with pneumonia two days earlier, her doctor said.
A video Sunday showed Clinton, 68, struggle to walk and being carried by aides into a van as she left the ceremony.
The campaign earlier in the day said Clinton had felt "overheated," and left the ceremony to go to her daughter Chelsea Clinton's Manhattan apartment.
A later statement from her physician, Dr. Lisa R. Bardack, said Clinton was diagnosed with pneumonia on Friday during a "follow-up evaluation of her prolonged cough."
She was put on antibiotics and advised to rest and modify her schedule, according to the statement from the campaign.
"While at this morning's event, she became overheated and dehydrated," the statement read.
Bardack said she re-examined the candidate "and she is now rehydrated and recovering nicely."
At 11:45 a.m. Sunday, Clinton emerged from Chelsea Clinton's apartment building, greeted a girl who ran up to her and waved to the crowd.
She said, "I'm feeling great, I'm feeling great."
"It's a beautiful day in New York," Clinton said.
She then got into the van. Clinton arrived at her Westchester County home about 1:30 p.m., her campaign said.
Clinton's campaign has been fending off questions about her health for months.
Clinton suffered a concussion in 2012 after falling in her Chappaqua home, and was later hospitalized with a blood clot resulting from the concussion.
Her campaign has denied any issues with her health.
Bardack released a statement Aug. 16 refuting fake medical records circulating on social media and conservative websites. "To reiterate what I said in my previous statement, Secretary Clinton is in excellent health and fit to serve as president of the United States," Bardack wrote.
At a rally last week in Cleveland, Clinton had a brief coughing fit on stage.
Republican presidential candidate Donald Trump also attended the 9/11 ceremony and left about 10:30 a.m.
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(With Alison Fox and Lisa Irizarry.)
