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US trial of Oxford University’s Covid-19 vaccine STILL on hold waiting on FDA decision


Scientists are asking why the US arm of Oxford’s Covid-19 vaccine trial are still on hold as the rest of the world races to test its efficacy.

AstraZeneca, the drug giant which owns the rights to the experimental jab, stopped global trials on September 8 because a British volunteer was hospitalised. She has now been discharged.

Uncertainty remains about what happened to the unnamed woman because of medical confidentiality. But leaked documents claimed the 37-year-old developed ‘transverse myelitis’ — a neurological condition which left her struggling to walk. 

Doctors restarted trials in the UK on September 12 after an independent safety review committee and the UK regulator, the Medicines and Healthcare Products Regulatory Agency, rapidly investigated and deemed it safe to do so. 

But the US are still holding back more than two weeks later, despite trials of the leading vaccine also continuing in Brazil, India and South Africa.

US experts have blasted drug giant AstraZeneca for not communicating clearly what had happened to the British woman, which is why things have moved more slowly. 

AstraZeneca’s CEO Pascal Soriot said today ‘we are waiting for FDA decision on resuming US’, suggesting the decision is still in the regulator’s hands.

He also said people would need to ‘trust that the experts, whose job it is to monitor these trials, are doing a good job’, in reviewing the safety data.

It came after it was revealed yesterday the FDA (the US Food and Drug Administration) are expected to issue new, tougher requirements for its approval of a coronavirus vaccine. 

The US arm of Oxford's Covid-19 vaccine trial are still on hold as the rest of the world races to test its efficacy. Pictured: A woman receiving a jab in South Africa

The US arm of Oxford’s Covid-19 vaccine trial are still on hold as the rest of the world races to test its efficacy. Pictured: A woman receiving a jab in South Africa 

AstraZeneca's CEO Pascal Soriot said today 'we are waiting for FDA decision on resuming US', suggesting the decision is in the regulators hands

AstraZeneca’s CEO Pascal Soriot said today ‘we are waiting for FDA decision on resuming US’, suggesting the decision is in the regulators hands

Professor Peter Jay Hotez, a virologist with Baylor College of Medicine in Houston, Texas, said: ‘Most likely the serious adverse events described by the Astrazeneca chief executive are unrelated to the vaccine.

‘The problem is that we learn about them through a teleconference from the CEO to JP Morgan investors. This is disastrous from a communications perspective, and says to me that [Mr Soriot is] oblivious to the fragility of the vaccine ecosystem.’ 

Professor Hotez was referring to the fact that on September 9, Stat News reported Mr Soriot, told investors in a conference call that the trial was stopped because the woman had symptoms consistent with transverse myelitis. This was not publicly known information at the time.

Professor Hotez told the New York Times: ‘The communication around it has been horrible and unacceptable. This is not how the American people should be hearing about this.’  

Professor Hotez has also previously criticised UK regulators who he said had failed to supply a clear rationale for resuming their trials. 


There have been several reports about the woman’s state of health since AstraZeneca first announced trials were being paused on September 8.

The drug giant announced studies in the UK, US, South Africa and Brazil had been paused indefinitely while it investigated whether the patient’s illness was connected to the vaccine. 

No details about the patient suffering the potential side-effect, or the nature of the reaction, were given in the initial statement, which said: ‘In large trials illnesses will happen by chance but must be independently reviewed to check this carefully.’ 

Medical news site Stat first reported the pause in the study, while The New York Times quoted a source saying a trial volunteer had transverse myelitis.

Amid rife suspicion, on September 9, Stat News reported AstraZeneca’s CEO, Pascal Soriot, told investors in a conference call that the trial was stopped because the woman had symptoms consistent with transverse myelitis.

Later that day, AstraZeneca said the media reports were ‘incorrect’, and that Mr Soriot had ‘stated that there is no final diagnosis and that there will not be one until more tests are carried out’. 

A leaked AstraZeneca report seen by CNN gave details about the 37-year-old woman. The document, which is labelled an ‘initial report’, was sent to doctors running the clinical trials to warn them of the hospitalised British patient.

It described how the study participant ‘had trouble walking, weakness and pain in her arms, and other symptoms’. 

Fourteen days after receiving her second dose of the vaccine in late August, the woman ‘experienced confirmed transverse myelitis’, the report allegedly says. 

On September 2, while running, the study participant ‘had a trip (not fall) with a jolt.’ The report notes that she did not have any obvious injury to her cervical spine.

The next day, the woman had symptoms including difficulty walking, pain and weakness in her arms, pain and reduced sensation in her torso, a headache and reduced ability to use her hands.

She was hospitalised on September 5, several days prior to the SUSAR sent to doctors, and medical news website Stat said she was due to be discharged on September 9 – a discharge date was never officially confirmed.

The AstraZeneca report mentions twice that the woman was diagnosed with ‘confirmed’ transverse myelitis – which is in contrast to the company’s claims last week that the condition was yet to be confirmed.

The cover sheet on the report, allegedly sent by a contractor hired by AstraZeneca, also described her illness as ‘confirmed’ transverse myelitis.  

A neurologist who saw the woman said her case ‘suggested the symptoms were consistent with the diagnosis of transverse myelitis’ and that she had no past history of neurological symptoms or significant illnesses.

But at another point, the report claimed to highlight there was ‘limited information concerning the subject’s relevant medical history.’ 

The neurologist said the woman’s symptoms started to get better quite rapid ‘considering her illness started only four days ago’. 

‘Her symptoms were improving. Her strength and dexterity in her hands was getting better,’ the report said. 

Physicians diagnose transverse myelitis by performing a thorough neurological examination. They use tests, such as an MRI and lumbar puncture, to rule out any other problems, such as an injury. 

In response to the article in CNN, AstraZeneca said it contained ‘inaccuracies including the diagnosis, which is based on preliminary findings’. But it refused to reveal what they were.

‘Tell us why you came to that decision,’ Professor Hotez was reported as saying.

Professor Scott Lucas, of the department of political science and international studies at University of Birmingham, also believes a lack of communication is behind the slow restart. 

He told MailOnline on Monday: ‘I don’t think that it’s necessarily the US is stricter than the UK. I think both have fairly rigorous regulatory systems. 

‘I think it is a question of communication and of what happened to US officials, so the US has moved more slowly.’ 

Today AstraZeneca’s CEO said during a virtual World Economic Forum: ‘We are waiting to here from the FDA that is reviewing the data. 

‘Essentially the data is reviewed by an independent safety committee that is then submitted to the regulator. And because the study is conducted by Oxford University — we are not the sponsor, they are. And they are of course focused on providing all this information to the regulators in all the other countries where they are sponsor. 

‘We are the sponsor of the US study, so we provided all this information to the FDA. And we are waiting to hear their decision.’ 

It comes after The Telegraph reported the FDA, the main drug regulator and American equivalent of the MHRA, has requested further data on the two adverse reactions in the vaccine trial.

Mr Soriot was pressed on the subject of transparency — important for public trust — given the drug giant has been criticised for failing to disclose details of the British woman.

Mr Soriot responded: ‘First of all I should say, stopping a trial in a vaccine programme is not uncommon. It’s not common either but it happens.  

‘The question is how can much transparency can you provide? The clinical guidelines recommend you don’t disclose patient level information. And you don’t disclose much information at all because you could compromise study.’

He said AstraZeneca was in discussion with other companies in the industry to come to some sort of consensus about level of transparency ‘without compromising patient privacy and the trial itself’, considering the ‘special set of circumstances’.

He added: ‘We all want to be as transparent as possible in all honesty. But the reality is we have to protect patients privacy and also the study integrity. 

‘At the e of the day, I think people have to accept that they have to trust someone at some point. So you have independent safety committees, you have regulators, and you don’t have one reg, you have several around the world… so many regulators will look at this data and these results with different eyes. 

‘But at the end of the day, you’ve got to trust that the experts, whose job it is to monitor these trials, are doing a good job.’  

Yesterday, the Washington Post reported the FDA will issue new, tougher requirements for its approval of a coronavirus vaccine.

Regulators could publish the new approval standards as early as this week, and will do so publicly in an effort to bolster Americans’ eroded trust in the US to ensure the safety a Covid-19 vaccine. 

According to a new Axios poll, less that less than 40 per cent of Americans now say they would get a coronavirus vaccine, with most citing fears over its safety, driven by the Trump administration’s concerted effort to expedite the development process. 

The move could obliterate the chances of a shot getting emergency use authorization before Election Day — considered precious to President Donald Trump. 

President Trump and his Operation Warp Speed initiative have been pushing for months to have a coronavirus vaccine approved ahead of the November 3.

They reportedly want to bypass normal US regulatory standards to fast-track Oxford’s vaccine for use in America by October. 

But Trump accused the FDA — with no evidence — of trying to delay a coronavirus vaccine until after the election for political purposes. 

Professor Lucas said: ‘Trump’s only motive here is to get re-elected and to get a vaccine shown as effective before November 3. If it ended up killing a lot of people after November 3, it’s irresponsible and you’ve scared people to think any vaccine will cause that effect.

‘Certain politicians have tried to push aside the scientific advice, and once you do that, it has very serious effects. 

‘Yes, this trial has had two adverse cases and that must be seriously considered. There must be communication, but that is to safeguard the scientific process and it must not manipulated by politics. 

‘The more that politics tries to exploit our fear and concern, it could undermine the effort against Covid-19 because it could scupper vaccine trials.’ 

Dr Anthony Fauci, director of the NIH, last week claimed that it is ‘just a matter of time’ before the trial resumes in the US, offering hope the vaccine will be back on track to become one of the first approved.

Uncertainty remains about what happened to the unnamed woman, who received the first dose of the experimental vaccine in June and the second in August.   

AstraZeneca has repeatedly refused to confirm the diagnosis of transverse myelitis. It also insists there is no proof that the vaccine was to blame for the woman’s symptoms, which are believed to have now subsided.      

An earlier pause to the trial, in July, was not made public until news of this month’s pause leaked, which further damaged trust. Although it is not clear if involved parties knew the information. 

The trial was restarted after it was determined the volunteer had an ‘undiagnosed case of multiple sclerosis’, a condition that can cause the same neurological reaction as transverse myelitis, which was deemed to be unrelated to the vaccine.

AstraZeneca did not explain how that conclusion was reached — or why it waited more than a month to mention it publicly.

A ‘participant information sheet’ on Oxford’s website, updated on September 11, gave further clues into the side effects experienced by volunteers so far.

It said: ‘In the current trial we have undertaken safety reviews when volunteers in the trials of ChAdOx1 nCoV-19 developed unexplained neurological symptoms including changed sensation or limb weakness, and have paused the study while a safety review took place. 

‘After independent review, these illnesses were either considered unlikely to be associated with the vaccine or there was insufficient evidence to say for certain that the illnesses were or were not related to the vaccine.’

It did not mention transverse myelitis despite the reports of diagnosis. However, it did say Guillain-Barré syndrome could occur.

Guillain-Barré syndrome and transverse myelitis are closely related conditions, both causing inflammation of the spinal cord. 

It said: ‘Reactions in the nervous system are also extremely rare, but can include an illness called Guillain-Barré syndrome, a condition in which people can develop severe weakness and can be fatal.’


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