Hillary Clinton is suffering from pneumonia, according to both CNN and the Associated Press.
Doctors said issue was caused by being “overheated and dehydrated,” according to CNN.
She was diagnosed on Friday, the 24-hour news network reported on Sunday.
Clinton was put on antibiotics and, according to “was put on antibiotics, and advised to rest and modify her schedule,” Dr. Lisa Bardack said in a statement.
“While at this morning’s event, she became overheated and dehydrated. I have just examined her and she is now re-hydrated and recovering nicely,” said Bardack, chairman of internal medicine at the Mount Kisco Medical Group.
Clinton required assistance at a 9/11 memorial at Ground Zero on Sunday morning, shown in a video posted by NBC News.
The Democratic presidential candidate was moved swiftly from the memorial in her campaign’s van to her daughter Chelsea’s New York apartment.
Clinton told reporters as she left that she was “feeling great.” Before smiling and stepping into her motorcade, she waved to supporters and said, “It’s a beautiful day in New York.”
.@HillaryClinton leaves daughter's apartment, says "I'm feeling great." https://t.co/S8IYanlNbR pic.twitter.com/lw2KBD6vtO
— ABC News Politics (@ABCPolitics) September 11, 2016
Clinton herself greeted press outside of Chelsea’s apartment (seen above).
“Secretary Clinton attended the September 11th Commemoration Ceremony for just an hour and thirty minutes this morning to pay her respects and greet some of the families of the fallen,” said Clinton campaign spokesman Nick Merrill.
“During the ceremony, she felt overheated so departed to go to her daughter’s apartment, and is feeling much better.”
The ceremony was held in New York, keeping with an annual tradition that began in 2012. Both Clinton and Republican candidate Donald Trump attended the event along with other dignitaries.
Some conservatives have raised concerns over Clinton’s health, some accusing her of hiding a serious illness.
Rudy Giuliani and other conservatives zeroed in on a coughing episode the Democratic candidate had at a Labor Day rally.