Hillary Clinton has said in a telephone interview that she is feeling "so much better", a day after being taken ill at a 9/11 commemoration.
Hillary Clinton has said in a telephone interview that she is feeling "so much better", a day after being taken ill at a 9/11 commemoration.
She also told CNN she had not disclosed a recent pneumonia diagnosis because "I just didn't think it was going to be that big a deal".
She also told CNN that she had not disclosed a recent pneumonia diagnosis because "I just didn't think it was going to be that big a deal".
The US presidential candidate said she had ignored a doctor's "wise" advice to rest for five days.
The US presidential candidate said she had ignored a doctor's "wise" advice to rest for five days.
Her rival Donald Trump said health had now become "an issue" in the campaign.
Her rival Donald Trump said health had now become "an issue" in the campaign.
Mrs Clinton said during the phone interview that she hoped to be back on the trail in "the next couple of days".
Mrs Clinton said during the phone interview that she hoped to be back on the trail in "the next couple of days".
The Democratic White House nominee acknowledged she had lost her balance during Sunday morning's health scare, but said she did not faint.
The Democratic nominee acknowledged she had lost her balance during Sunday morning's health scare, but said she did not faint.
"I felt dizzy and I did lose my balance for a minute, but once I got in (the van), once I could sit down, once I could cool off, once I had some water, I immediately started feeling better," she said.
"I felt dizzy and I did lose my balance for a minute, but once I got in (the van), once I could sit down, once I could cool off, once I had some water, I immediately started feeling better," she said.
What is 'walking pneumonia'?
A history of US presidential bad health
Video showed Mrs Clinton being supported by aides as she entered a van to leave Sunday morning's 9/11 ceremony.
Her campaign initially said she had been taken to her daughter's New York flat after feeling "overheated".
She re-emerged later on Sunday, telling reporters: "I'm feeling great. It's a beautiful day in New York."
Doctors later said she had been diagnosed with pneumonia on Friday.
Doctors later said she had been diagnosed with pneumonia on Friday.
Some critics questioned why this had only been revealed after Sunday's events.
Some critics questioned why this had only been revealed after Sunday's events and Mrs Clinton's communications director conceded the incident had been poorly managed.
Mrs Clinton's communications director conceded the campaign "could have done better" managing the incident.
She will be releasing new medical records to help ease concerns about her health, a campaign spokesman said.
She will be releasing new medical records to help ease concerns about her health, a campaign spokesman said.
"There's no other undisclosed condition. The pneumonia is the extent of it," Brian Fallon told MSNBC.
It capped a difficult weekend for Mrs Clinton, who came under attack from Mr Trump for calling half of his supporters "deplorable" people on Friday.
It capped off a difficult weekend for Mrs Clinton, who came under attack from Mr Trump for calling half of his supporters "deplorable" people on Friday.
On Monday, the Republican presidential nominee wished her a speedy recovery.
On Monday, the Republican presidential nominee wished her a speedy recovery.
He pledged to release the results of a medical examination he took over the past week, with "very specific numbers".
He also pledged to release the results of a medical examination he took over the past week.
Mrs Clinton had been due to leave for California on Monday morning for a two-day trip that included fundraisers, a speech on the economy, and an appearance on the Ellen DeGeneres Show.
Mr Trump has repeatedly suggested Mrs Clinton is unfit, telling supporters last month she "lacks the mental and physical stamina" to serve as president.
But she has instead been resting at home in Chappaqua, New York.
Mrs Clinton suffered a coughing fit last week at a campaign event in Cleveland, Ohio, which also fuelled speculation about her condition.
Last month, her personal doctor Lisa Bardack said in a letter that the candidate was "in excellent health and fit to serve as president of the United States".
She had made a full recovery from surgery she underwent in 2012 for a blood clot, the doctor added.
But Mr Trump has repeatedly suggested she is unfit, telling supporters last month she "lacks the mental and physical stamina" to serve as president.
"I don't know what's going on. I'm like you, I see what I see," he said after Mrs Clinton's pneumonia diagnosis was announced.
The Clinton campaign has accused opponents of pushing a "deranged conspiracy" about her health.
The Clinton campaign has accused opponents of pushing a "deranged conspiracy" about her health.
Major fall or just a stumble? - Anthony Zurcher, BBC News
Major fall or just a stumble? - Anthony Zurcher, BBC News
Will Hillary Clinton's near collapse during Sunday's 9/11 memorial ceremonies make her health a political Achilles heel?
Will Hillary Clinton's near collapse during Sunday's 9/11 memorial ceremonies make her health a political Achilles heel?
What should be most concerning to the Clinton team is that the Trump campaign managed to hold its tongue as the news unfolded, probably sensing that the story was damaging enough on its own. In his first public comments on Monday morning, for instance, Mr Trump only said that he hoped Mrs Clinton made a full recovery.
The Trump campaign managed to hold its tongue as the news unfolded, probably sensing that the story was damaging enough on its own.
Presidential campaigns go through great efforts to portray their candidate as healthy and full of vigour, while presidents who had health troubles concealed their weaknesses.
At 68, Mrs Clinton is particularly susceptible to concerns about her health (as is 70-year-old Mr Trump).
At 68, Mrs Clinton is particularly susceptible to concerns about her health (as is 70-year-old Mr Trump). She has the additional challenge of being the first female presidential nominee from a major political party - and may have to face biases within the electorate over whether a female candidate is sufficiently "strong", regardless of her age.
But if she returns to her normal campaign schedule without incident, she will go a long way towards putting health concerns to bed.
But if she returns to her normal campaign schedule without incident after a few days of recuperation, she will go a long way towards putting health concerns to bed.
Will Clinton pay for her terrible weekend?
What is walking pneumonia?
Mrs Clinton's team say she is suffering with "walking pneumonia" - a less serious type of the lung infection which leaves patients feeling unwell but doesn't usually require bed rest or hospitalisation.
Pneumonia is essentially an infection of the lungs which causes inflammation in the air sacs and fills them with fluid. Symptoms can include a cough, fever, fatigue, chills and shortness of breath.
Anyone can contract pneumonia, although smokers, older people, and sufferers of chronic lung diseases are at increased risk. There are two types - bacterial or viral. Bacterial pneumonia is common and easily treated with antibiotics.
Most people with so-called "walking pneumonia" can recover within a few days. Those with weak immune systems or existing conditions can take weeks to recover, and pneumonia can in some cases be fatal.bb