A person who was filmed in a video that has been seized upon by right-wing groups to suggest Hillary Clinton 'had a seizure' on camera has hit back at the outlandish claims.

Lisa Lerer, a reporter covering Clinton's campaign for the Associated Press, was on hand for the latest moment conspiracy theorists have latched onto in an attempt to discredit the Democratic nominee.

In the video, which was shot on June 10 at a muffin shop in Washington DC, Lerer was one of the reporters who 'shouted' questions at Clinton about a meeting she had recently had with Massachusetts Sen. Elizabeth Warren.

In Lerer's words, Clinton: 'perhaps eager to avoid answering or maybe just taken aback by our volume [she] responded with an exaggerated motion, shaking her head vigorously for a few seconds.'

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One of the people filmed in a video of Hillary Clinton that right-wing groups claim shows candidate 'had a seizure' on camera has hit back at the outlandish claims

In the video, which was shot on June 10 at a muffin shop in Washington DC, Clinton 'responded with an exaggerated motion', after being asked questions by reporters

'Video of the moment shows me holding out my recorder in front of her, laughing and stepping back in surprise,' she wrote for the Associated Press.

'After the exchange, she took a few more photos, exited the shop and greeted supporters waiting outside.'

However, almost two months after the 'innocuous' incident took place, it was being broadcast and analyzed by right-wing host Sean Hannity and a 'Fox News Medical A-Team'.

By devoting a week of his show to the conspiracy theory, the host exposed it to more mainstream attention than ever.

Hannity, who has publicly endorsed Republican nominee Donald Trump and previously supported the debunked Barack Obama 'birther' movement, told his hand-picked panel of medical experts Clinton's movement in the video appeared 'seizure-esque'.

'This looks like violent, out of control movements on her part,' the Fox News host said.

Lisa Lerer, a reporter covering Clinton's campaign for the Associated Press, said where she saw 'evasiveness', conspiracy theorists saw 'seizures'

Fox News host Sean Hannity has dedicated a week of his show to 'Hillary's Health', including many segments about Clinton's response in the video (right)

Hannity also referenced an old picture that was wrongly circulated by right-wing websites recently that showed the Democratic nominee slipping while walking up a flight of stairs.

A host of anti-Clinton blogs and websites falsely presented the image as proof the 68-year-old candidate is in poor health.

However, the picture that they claimed to be new, was taken at the top of a staircase in South Carolina on February 24.

Right-wing blog American Mirror started its conspiracy-theorizing post by stating Clinton's health should be 'a major issue of the 2016 campaign'.

Right-wing websites are circulating an old picture of Hillary Clinton slipping while walking up a flight of stairs (pictured) to question the Democratic nominee's health ahead of the election

It then went on to wrongly say the photograph in question is, 'the latest evidence', to support its conspiracy - despite the picture being almost seven months old.

The blog post was then shared by the Drudge Report, a more well-known right-wing website, along with the headline: 'Hillary conquers the stairs'.

The website also linked the incorrect story to other 'incidents' with Clinton in the past, such as the time she tripped while getting on a plane in 2012, when she fractured her elbow after slipping over in the White House in 2009, and when she was treated for blood clots in 2012 and 2013, to try to add more weight to the health conspiracy.

CNN host Brian Stelter attempted to correct the blog posts after the surfaced on Twitter.

The photograph is falsely being presented as some form of proof Clinton (pictured) is in poor health

CNN host Brian Stelter attempted to correct the blog posts after the surfaced on Twitter on Sunday

'This photo is from February 24. She slipped. But it's suddenly getting a lot of right wing media attention today,' Stelter tweeted.

' Pro-Trump accounts shared the out-of-context pic last night. Then American Mirror wrote a "SHOCK PHOTO" blog post.

'Now it's the lead on Druge Report - "PHOTOS REVEALED." Huh? "Clinton slips" pics were published in February.'

Clinton has long insisted she is in good health in an attempt to put an end to the conspiracy theories, and in September 2015 she took the extraordinary step of releasing a letter from her doctor proving her fitness.

The conspiracy theories linked the photograph of Clinton slipping to when she fractured her elbow in 2009, and had to wear a sling (pictured)

The right-wing theories also referenced previous treatment Clinton had for blood clots in 2012. Pictured, Clinton leaves hospital in January 2013 after treatment

Doctor Lisa Bardack, from New York, detailed the candidate's health history, including previous treatments for concussion, complete family history of heart disease, an analysis of blood clots, and a thyroid gland examination, according to the New York Post.

Doctor Bardack found Clinton's cancer screening tests were normal, as were her electrocardiogram and her blood lipids.

Right-wing websites and outlets have regularly attempted to push conspiracy theories designed to undermine Democratic candidates in recent years - such as the 'birther movement' that questioned where President Barack Obama was born, and former President Bill Clinton had a 'body count' of questionable deaths linked to him.