Campaign revealed that Clinton had been diagnosed with pneumonia

She had another fainting episode last month during the 9/11

Democratic candidate's health has been hot topic of debate since she suffered a concussion when she fainted at home

advisers that: '(Clinton's) going to stick to notes a little closer this am, still not perfect in her head'

Huma Abedin warned Clinton's campaign team that Hillary would have to 'stick to her notes' at an event because she was 'still not perfect in her head.'

The personal emails, belonging to Clinton campaign chairman John Podesta, were published by WikiLeaks on Tuesday.

The exchange in April, 2015, came at the end of a discussion between the Democratic candidate's aides about Jeb Bush's utilization of Super PACs.

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Huma Abedin (left, at the third debate ) warned Clinton's campaign that Hillary (at a Florida campiagn event, on Tuesday, right) would have to 'stick to her notes' at a campaign event because she was 'still not perfect in her head

Abedin told chief campaign strategist: 'She's going to stick to notes a little closer this am, still not perfect in her head'

'I will leave commenting on campaign tactics to others. What I have made absolutely clear is that corporate money and secret money have no place in our democracy and we should get rid of it once and for all,' said the campaign's chief strategist Joel Benenson.

Abedin replied, with many of Clinton's advisers CC'd in, that: 'She's going to stick to notes a little closer this am, still not perfect in her head.'

The aide's email dates to April 21, 2015 - just a few days after Clinton kicked off her presidential campaign.

And it appears the aides' concern continued as they repeatedly discussed Clinton's head according to leaked emails.

In September of that same year, Podesta wrote to Communications Director Jennifer Palmieri to ask: 'How bad is her head?' in an email with the subject line 'Any sense of whether and when she wants to talk?'

Don't know,' Palmieri replied. 'Huma left here about an hour ago. I just pinged again to ask about prep, haven't heard back.'

The emails suggest that Clinton's health was a frequent topic of concern since she suffered a concussion and 'cracked head' during a fall in December 2012.

Doctors discovered a blood clot in her head during examinations and Clinton was forced to take a month's absence to recover. By 2013, her doctors said that her treatment was successful and she'd had a 'complete resolution' to the episode.

But the latest Wikileaks dump appear to show that her aides were still concerned.

Questions about Clinton's health have lingered since she stumbled while leaving a 9/11 anniversary event last month (pictured)

Taking her pulse? Christine Falvo was seen holding Clinton's hand as the candidate's aides' concern mounted at her physical state and she was taken towards the Secret Service van at the 9/11 memorial on Sunday in New York

In another email released by WikiLeaks, Abedin suggested a Clinton speech should be shortened 'because it's a bank of Mics and no podium.'

The message suggests that not having a lectern for Clinton to lean on was a serious concern.

An email released in 2013, as part of Freedom of Information request, revealed that Clinton was 'often confused', according to Abedin.

The exchange between Abedin and aide Monic Hanley opened with Hanley saying that Clinton 'was in bed for a nap by the time I heard that she had an 8am call. Will go over with her.'

'Very imp [sic] to do that,' Abedin responded. 'She's often confused.'

The email prompted concerns that Clinton could be suffering from a traumatic brain injury (TBI) after her 2012 concussion.

Questions about the former first lady's health were raised again last month after she stumbled while leaving a 9/11 anniversary event in New York.

While the campaign initially tried to blame the episode on dehydration, on the particularly hot September day, they were later forced to reveal that Clinton had been diagnosed with pneumonia.

A new television ad from Donald Trump's campaign, released earlier this month, raises questions about Clinton's health and her fitness to run for office.

Using footage of the 68-year-old's fainting episode last month, along with clips of her being assisted up the stairs and coughing, the ad is titled, 'Danegrous.'

The aide's email dates to April 21, 2015 - just a few days before Clinton kicked off her presidential campaign

'Hillary Clinton doesn't have the fortitude, strength or stamina to lead in our world,' the narrator says in the ad, as foreboding music plays in the background.

It's a comment he has made numerous times - particularly after Clinton was diagnosed with pneumonia in September - something she kept private until she almost collapsed at the 9/11 commemorations.

During the first presidential debate, Trump said of his opponent: 'She doesn't have the look, she doesn't have the stamina.

'To be president of this country, you have to have tremendous stamina.'

CLINTON'S VITAL STATISTICS The Clinton campaign released a letter from her doctor, Lisa Bardack, which set out key medical details about the Democratic candidate. Medical conditions: Hypothyroidism and seasonal allergies Blood pressure: 100/70 Pulse: 70 Cholesterol: 189 (LDL 103, HDL 56, tryglycerides 159) Respiratory rate: 18 Temperature: 97.8 Pulse-oximetry: 99% Height: not disclosed Weight: not disclosed Mental condition: 'excellent' Medications: Prescribed Levaquin for bacterial pneumonia. Previously received anti-pneumonia vaccines Prevnar and Pneumovax, on undisclosed dates. Takes Coumadin, a blood thinner, also Armor thyroid and B12 'as needed'. Advertisement

However, Clinton had responded with the perfect put down.

'As soon as he travels to 112 countries and negotiates a peace deal, and a cease fire, a release of dissidents, an opening of new opportunities in nations around the world, or even spends 11 hours testifying in front of a congressional committee, he can talk to me about stamina,' she said.

The emails are among more than 30,000 emails allegedly hacked from accounts of Clinton's senior staff and dumped in the WikiLeaks database in recent weeks.

In response, the Clinton campaign released a statement, accusing Russia of being behind the leaks.

'In a brazen display of collusion, Russian state owned television continues to promote WikiLeaks' releases even before [WikiLeaks founder Julian] Assange can do it even after it's been proven beyond any reasonable doubt that the Russians are the source of the purported Podesta material,' the statement read.

'Given a third opportunity on the debate stage to admit and condemn the Kremlin's actions, Donald Trump refused to do it and instead continues to act as Putin's puppet despite being briefed by U.S. intelligence. It is bizarre and disqualifying that he continues to cheer on this attack on our democracy. It is time for Donald Trump to tell the American people what he knows and when he knew it.'

Joel Benenson, told ABC News he has seen things in the leaks that 'we know aren't authentic.'