NEW YORK (Reuters) - Hillary Clinton canceled a trip she was scheduled to take to California on Monday for fundraising and other campaign events, an aide said, declining to provide further details about her schedule for the week.

Clinton, 68, was diagnosed on Friday but her condition only came to light several hours after a video on social media appeared to show her swaying and her knees buckling before being helped into a motorcade as she left the memorial early Sunday.

Clinton had a medical examination when she got back to her home in Chappaqua, New York, according to a campaign aide. Her doctor, Lisa Bardack, said in a statement that she has been experiencing a cough related to allergies and that an examination on Friday showed it was pneumonia.

She was put on antibiotics and advised to rest and modify her schedule. While at this mornings event, she became overheated and dehydrated. I have just examined her and she is now re-hydrated and recovering nicely, Bardack said.