
Hillary Clinton has called off plans to visit the West Coast on Monday and Tuesday following her 'medical episode' at the 9/11 memorial ceremony.

Her doctor revealed that the 68-year-old has pneumonia - hours after a video showed her collapsing into the arms of her Secret Service agents after being rushed from the memorial service at the World Trade Center.

Dr Lisa R Bardack said Sunday evening that Clinton had become overheated and dehydrated at the event in lower Manhattan.

Bardack said Clinton is now 'recovering nicely' at her home in Chappaqua, New York.

The Democratic nominee was scheduled to attend fundraisers on Monday and Tuesday in California, and tape an episode of Ellen DeGeneres' talk show.

Clinton is now holed up in her upstate New York home after a bystander recorded her losing her balance, slumping at the knees and being held up by her aides while waiting to get in a minivan.

Her campaign had earlier blamed 'overheating' for the episode - which saw her rushed away from the ceremony at Ground Zero and back to Chelsea's apartment.

Her press pool was not informed for 90 minutes of her whereabouts or given an explanation for the abrupt departure.

At the time the temperature was around 80 degrees and the humidity was low.

Earlier on Sunday, Bardack said that Clinton 'has been experiencing a cough related to allergies'.

On Friday, during follow up evaluation of her prolonged cough, she was diagnosed with pneumonia.

Bardack said Clinton was put on antibiotics, and advised to rest and modify her schedule.

'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.'

Clinton's collapse adds to growing fears for her health, which began mounting on Labor Day when she broke out in a coughing fit during a speech in Ohio.

It now seems that cough has developed into pneumonia, according to Bardack's statement.

Katie Packer, a GOP strategist, told the Los Angeles Times that the incident will increase attention on the health of both Clinton and Trump, 70.

'This is the kind of thing that voters have a right to understand before they cast a vote,' she said.

'But Trump and Hillary are elderly. They are obligated to release full medical records and full tax returns to the American people. And the media, party leaders and American people should settle for nothing less.'

Video has surfaced of Hillary Clinton appearing to stumble as she was led into a van after suffering a 'medical episode' during the 9/11 memorial service. Her doctor later revealed that she has been diagnosed with pneumonia

The presidential candidate is seen standing on a curb near the World Trade Center when she appeared to lose her balance

Several party leaders and Clinton backers told POLITICO that she needed to offer a fuller accounting of her health.

'There will have to be some kind of accounting for this,' said one former Clinton adviser.

Clinton was already facing calls on Sunday afternoon to release her full medical records.

In the footage, Clinton is seen standing on a curb near the site of the Twin Towers when she suddenly appears unable to stand.

She seems to nearly fall to the ground before she is caught by her aides, who hold her up. Her security detail then had to help her into the van by grabbing each of her arms.

The former Secretary of State then appears to fall forward towards the door of the van before being bundled inside.

Law enforcement sources told the Daily Beast she was thrown into the back seat like a 'side of beef'.

She appeared to lose a shoe under the vehicle in the struggle before being driven to daughter Chelsea's apartment in Manhattan.

Despite the concerning footage, she emerged from the home just over two hours later at 11.45am on Sunday saying she was fine. She told a waiting crowd and reporters: 'I'm feeling great, it's a beautiful day in New York.'

A smiling Clinton was then greeted by a young girl on the street to pose for a picture. She waved at customers at a nearby restaurant before getting into a van.

Clinton then traveled to her home in Chappaqua, New York, according to her campaign.

It is not known whether she saw a doctor.

Nick Merrill, her traveling press secretary, said Clinton 'overheated' during the ceremony, but quickly recovered when she returned to Chelsea's apartment.

She recently said she had been suffering from allergy attacks since Labor Day and had upped her antihistamine dosage.

The concerning footage shows her knees appearing to buckle, causing her to fall towards two of her handlers. They then steady her on the sidewalk

Her aides then rushed to her side and then helped her into the van before she was rushed off to Chelsea's Manhattan home

Clinton emerged from her daughter Chelsea's apartment after she was rushed from the 9/11 memorial service because of a 'medical episode'

Despite the concerning footage, she emerged from the home at 11.45am on Sunday saying she was fine. She is pictured speaking with a little girl in front of her daughter's apartment building

Clinton was seen smiling and waving at customers at a nearby restaurant before getting into a van. She then traveled to her home in Chappaqua, New York, according to her campaign

Clinton suffered two coughing fits this week while on the campaign trail, one while she was speaking publicly in Ohio on Monday and another while she was taking questions from reporters.

Dailymail.com had asked Clinton about her health Thursday pointing to notes released by the FBI as part of the bureau's email investigation that suggested Clinton may have suffered memory loss from the concussion she sustained in 2012.

'Can you clarify what you told the FBI about your concussion?' Dailymail.com had asked the candidate, to which Clinton replied curtly, 'read the reports,' offering no additional explanation.

There are also questions over whether the Secret Service had to adapt to the situation and shied away from standard procedure when they whisked Hillary away from the scene.

A source told the Washington Post that agents are supposed to wait for a car before they take a protected individual away.

In the video, Hillary is seen leaning against a bollard before the motorcade draws up.

They appeared to have rushed her departure, which meant lead agent Todd Madison had to leave her side to open the van door, which is also against protocol.

The Secret Service later denied they had broken protocol.

Nick Merrill, her traveling press secretary, said Clinton 'overheated' during the ceremony, but quickly recovered when she returned to Chelsea's apartment

The 68-year-old greeted people with a smile as she walked down the street. She recently said she had been suffering from allergy attacks since Labor Day and had upped her antihistamine dosage

Today, shortly after 9.30am, the pool reporter covering Clinton at the World Trade Center notified the rest of the press that the Democrat had disappeared from the event with no notice from the campaign.

She had spent about 90 minutes at the memorial.

Her disappearance for more than an hour is questionable as no reporter was allowed to follow her, which according to a report from the Washington Post is, yet again, the Clinton campaign asking everyone to just trust it.

It wasn't until 11am that reporters were told where Clinton went and what had happened, though Fox News had already reported that Clinton had suffered from a 'medical episode.'

Trump said he had 'no idea' what happened when asked about his rival's health after the ceremony.

Trump's campaign did not respond to a request for additional comment from Dailymail.com.

Some attendees at the ceremony told the New York Times that Clinton had not appeared ill when she first arrived.

Representative Peter T King, of New York, who said he spoke briefly with Clinton around 8.30am told the Times that Clinton 'seemed fine'.

Merrill said in a statement: '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.

She told waiting reporters: 'I'm feeling great, it's a beautiful day in New York'

Clinton was taken from the 9/11 memorial site at 9.30am on Sunday, just 90 minutes after arriving to remember the 2,977 people who lost their lives

The Democratic presidential candidate was standing alongside rival Donald Trump and other politicians when she apparently fainted, according to reports

One of Clinton's handlers is seen with his arm across her shoulders. She is seen with her arm resting on his back as she leaves the ceremony

Her campaign team said she 'overheated' during the ceremony. It was around 80 degrees at Ground Zero during the service

Onlookers have also said her symptoms seemed far worse than her aides have suggested

Witnesses said her departure from the service was 'unexpected', but they said it was 'clear' that she had a medical episode

'During the ceremony, she felt overheated so departed to go to her daughter's apartment, and is feeling much better.'

Clinton's press team later updated the statement to remove the word 'just,' stating it was a 'typo.'

Eyewitnesses said that Clinton had to wait a couple of minutes for her motorcade as it wasn't waiting for her when she exited the event.

Fox News reporter Rick Levanthal, who broke the initial story, quoted one person who was standing 15 feet away from Clinton who saw her stumble off the curb.

Her 'knees buckled', Levanthal tweeted, as she lost a shoe during this 'unexpected early departure'.

Her detail retrieved a shoe from underneath the van and helped the former secretary of state inside, according to reports.

The temperature was around 80 degrees at Ground Zero during the service. There was a humidity of 41 per cent.

Clinton was standing in the middle of a crowd of politicians packed together in a small space.

Clinton's pool reporter wrote that she could not see whether the Democratic hopeful was standing in direct sunlight, though noted that there wasn't a lot of shade in the area where the politicians were gathered.

Hillary was joined by politicians, including Bill de Blasio, as mourners remembered the 15th anniversary of the attacks

WHY HILLARY WAS ABLE TO DITCH THE PRESS Around 9.30am today Hillary Clinton left the 9/11 ceremony in New York City and it wasn't until 11 a.m. that reporters were told why she had left and where she headed, with her campaign saying she felt 'overheated' and was recovering at daughter Chelsea's Manhattan apartment. While a 'pool' of reporters accompanied Clinton to today's service, the Clinton campaign has so far refused to agree to what is called a 'protective pool,' which is how President Obama's movements are covered. The White House and the White House Correspondents Association have agreed to a set of rules that include having reporters travel with the president in motorcades and cover his arrivals and departures from the White House and events. Those rules would have required that the Clinton campaign allow reporters to accompany Clinton to Chelsea's house today while she recovered, though the campaign may have still kept reporters at an arm's distance from the candidate, as she wobbled into her black van. Donald Trump's campaign has also not allowed a protective pool to cover the Republican hopeful. Twice recently the billionaire has ditched his traveling press in another city, while heading elsewhere. The first time, Trump and his running mate Mike Pence headed to Louisiana to survey flood damage. The Trump campaign also sent the press plane ahead to Phoenix, Arizona, while the candidate headed to Mexico to meet with the country's president. Reporters covering Clinton have pressed again and again for a protective pool but had let up in recent days as the candidate started answering more questions from journalists on the campaign trail. No doubt today's events will renew this discussion. Advertisement

Clinton had already suspended campaigning on Sunday in a show of support for those who died on 9/11 and those who survived the terror attacks.

Earlier on Sunday she tweeted: 'We'll never forget the horror of September 11, 2001. Today, let's honor the lives and tremendous spirit of the victims and responders.'

Clinton was a senator from New York 15 years ago and did a sit-down interview with CNN's Chris Cuomo about her experience during and after the attacks.

She recalled being evacuated from the Senate office buildings in Washington, D.C. on 9/11 and then heading to New York City alongside her peer, Sen Chuck Schumer, on Sept. 12.

Clinton visited lower Manhattan and described what she saw on the ground as 'hell'.

'We saw this curtain of black smoke that was stretched across the island.

'Occasionally it would be broken by a firefighter coming out. I remember one image so indelibly, dragging his ax, and it was as close to a depiction of hell that I have ever personally seen.

'PHARMA BRO' MARTIN SHKRELI SHOWS UP OUTSIDE CHELSEA CLINTON'S APARTMENT TO TROLL HILLARY ABOUT HER HEALTH ‘Pharma Bro’ Martin Shkreli showed up outside Chelsea Clinton’s Manhattan apartment on Sunday to taunt Hillary Clinton about her health. Shkreli was waiting outside and wrote on Twitter that he enjoyed hurling abuse at 68-year-old Clinton. He stood outside, shouting at her to drop out of the election and voicing his support for her rival Donald Trump. Shkreli found infamy after controversially hiking the cost of a lifesaving drug by 5,000 per cent last year Shkreli wrote on Twitter that he enjoyed screaming at Hillary Clinton as she left her daughter's apartment in New York on Sunday ‘Pharma Bro’ Martin Shkreli showed up outside Chelsea Clinton’s Manhattan apartment on Sunday to taunt Hillary Clinton about her health ‘I enjoyed screaming “why are you so sick” and “go trump’ at @HillaryClinton,’ he later wrote on Twitter, adding: ‘Get well soon bae!’ Shkreli also posted a video of his antics on YouTube captioned: ‘Me yelling stupid stuff at Hillary.’ In the short clip, he is heard asking her: ‘Do you need Pharma Bro’s help?’ Shkreli found infamy after controversially hiking the cost of a lifesaving HIV drug by 5,000 per cent last year. The 33-year-old former CEO of Turing Pharmaceuticals, sparked outrage and earned the title of the country's most-hated man on the internet when he raised the price of the anti-parasitic infection drug Daraprim to $750 a pill. In December, US authorities arrested him on fraud charges unrelated to Daraprim, saying he ran his investment funds and companies almost like a Ponzi scheme. He pleaded not guilty to the allegations and a trial date was set for June 2017. Advertisement

She suspended her campaign on Sunday as a mark of respect for those who died

Earlier on Sunday, she was seen wearing sunglasses as she arrived in New York

'There weren't that many survivors; the ones that did survive were grievously injured. The loss of life was overwhelming.

'But it was also my job and the job of other officials to get our city and state and country what we needed,' she said.

She noted in the CNN interview that she visited New York City before then-President George W. Bush and played up her role in helping the city get federal funding to rebuild and aiding first responders in getting proper medical care after being exposed to the dirty air coming from the burning remains of the Twin Towers.

Today's health scare, however, will likely bury the effect the CNN interview would have on her poll numbers, which have dipped into being within spitting distance of Trump's in recent days.

Instead, the fainting spell could lend proof to conspiracy theories that Trump's allies have pushed, which suggest Clinton's health is failing.

It was Trump surrogate Rudy Giuliani, the former New York City mayor, that brought these theories into the mainstream by saying on Fox News Sunday last month that voters should 'go online and put down "Hillary Clinton's illness." Take a look at the videos for yourself,' the Republican instructed.

This came a week after Trump himself had told a crowd that Clinton lacked the 'mental and physical stamina to take on ISIS'.

Clinton speaks to outgoing NYPD Commissioner Bill Bratton (behind her) and New York Governor Andrew Cuomo (right facing towards her)

CAN CLINTON'S PNEUMONIA WORSEN AND WHAT IT MEANS FOR HER PRESIDENT RUN: It hasn't been specified as to what type of pneumonia Clinton has, but whether she has walking pneumonia or bacterial pneumonia, if the illness isn't treated properly it could worsen. Causes: In most cases pneumonia is caused by a bacteria or virus, such as the flu. Some people get pneumonia after breathing infected air particles into their lungs. It can also occur during or after a viral upper respiratory infection, such as a cold or flu. Doctors have said that allergies could lead to pneumonia because seasonal allergies can sometimes cause upper respiratory problems. Symptoms may include: Cough, often producing mucus, Fever, shaking, 'teeth-chattering' chills. Fast, often shallow, breathing and the feeling of being short of breath, as well as feeling very tired or weak. What happens when you have pneumonia: Depending on your age and health, older, sicker people usually have more severe cases. And their cases of pneumonia are more likely to cause complications, such as bacteria in the bloodstream or throughout the body. Pneumonia is more serious in the age group of 65 or older, because they often have and may develop other medical problems. Can it get worse? Without the proper treatment, it may get worse. A person may have breathing problems, or the infection can spread to other areas of your body. Pus or extra fluid may collect in the space around your lungs, or your lungs may get damaged. You may not be able to get enough oxygen if your lungs are inflamed or damaged. Low oxygen can cause damage to other body organs, such as your kidneys, heart, and brain. People can die from bacterial pneumonia if they don't receive the proper treatment, or if a person's body doesn't respond well to treatment, the infection will worsen. How can Clinton's health scare affect her run for president? Dr Lisa R Bardack (pictured) released a statement through her campaign team after the incident saying that she advised Clinton to modify her schedule and put her on antibiotics When Clinton abruptly left the 9/11 anniversary ceremony Sunday after feeling 'overheated', the incident opened up an even bigger can of worms. By Sunday afternoon, hours after video showed her collapsing into the arms of her Secret Service agents, the Democratic candidate was bombarded with calls for her to release her full medical records. GOP candidate Donald Trump, for months now, has been calling for Clinton to release the records and the nominee now has a powerful, visceral counter-argument – that she is physically unfit to serve, reinforced by video that raises new, and unanswered, concerns about her health. The video will only amplify the questions, in part because of the lack of details from her campaign about what occurred. Dr Lisa R Bardack released a statement through her campaign team after she performed a check-up on the presidential candidate at her home after the 'medical episode'. She said: 'Secretary Clinton has been experiencing a cough related to allergies. On Friday, during a follow up evaluation of her prolonged cough, she was diagnosed with pneumonia. Clinton's doctor put her antibiotics and advised her to rest and modify her schedule. Source: WEBMD Advertisement

Clinton's campaign interpreted Trump's words to mean that he was peddling some of the right-wing conspiracy theories going around the internet including that Clinton had suffered a seizure on camera and that she was showing signs of dementia.

Trump's comment prompted the Clinton campaign to address her health and fitness for the first time since releasing a doctor's note a year before.

'While it is dismaying to see the Republican nominee for president push deranged conspiracy theories in a foreign policy speech, it's no longer surprising,' Clinton's communications director Jennifer Palmieri said in a statement.

'Donald Trump is simply parroting lies based on fabricated documents promoted by Roger Stone and his right wing allies,' Palmieri continued.

She then pivoted for a moment to blast Trump for not releasing any of his tax returns to the American public.

'Hillary Clinton has released a detailed medical record showing her to be in excellent health plus her personal tax returns since 1977, while Trump has failed to provide the public with the most basic financial information disclosed by every major candidate in the last 40 years,' she acknowledged.

'It's time for him to stop using shameful distractions to hide his own record,' Palmieri added.

Clinton's people included a new statement from her physician, Dr Bardack, who had signed off on the Democrat's health in the beginning months of her campaign last year.

Clinton, New York Mayor Bill de Blasio (right) and U.S. Senator Chuck Schumer (left) attend ceremonies to mark the 15th anniversary of the September 11 attacks

'As Secretary Clinton's long time physician, I released a medical statement during the campaign indicating that she is in excellent health,' Bardack wrote last month.

'I have recently been made aware of allegedly "leaked" medical documents regarding Secretary Clinton with my name on them. These documents are false, were not written by me and are not based on any medical facts,' she continued.

'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 said.

In December 2012, Clinton fainted and suffered a concussion after contracting a stomach virus. She later developed a blood clot.

She’s been taking the anticoagulation drug, Coumadin, ever since.

In 2005, she fainted before a scheduled speech in Buffalo, New York, after suffering a similar stomach virus.

Beyond Giuliani and Trump, Clinton's health also became front-and-center when Dr Drew Pinsky said he was 'gravely concerned not just about her health, but her health care'.

'It just seems like she’s getting care from somebody that she met in Arkansas when she was a kid, and you’ve got to wonder. You’ve got to wonder,' Pinsky had said.