Covid-19: Researcher blows the whistle on data integrity issues in Pfizer’s vaccine trial
BMJ 2021; 375 doi: https://doi.org/10.1136/bmj.n2635 (Published 02 November 2021)Cite this as: BMJ 2021;375:n2635
Revelations of poor practices at a contract research company helping to carry out Pfizer’s pivotal covid-19 vaccine trial raise questions about data integrity and regulatory oversight. Paul D Thacker reports
In autumn 2020 Pfizer’s chairman and chief executive, Albert Bourla, released an open letter to the billions of people around the world who were investing their hopes in a safe and effective covid-19 vaccine to end the pandemic. “As I’ve said before, we are operating at the speed of science,” Bourla wrote, explaining to the public when they could expect a Pfizer vaccine to be authorised in the United States.1
But, for researchers who were testing Pfizer’s vaccine at several sites in Texas during that autumn, speed may have come at the cost of data integrity and patient safety. A regional director who was employed at the research organisation Ventavia Research Group has told The BMJ that the company falsified data, unblinded patients, employed inadequately trained vaccinators, and was slow to follow up on adverse events reported in Pfizer’s pivotal phase III trial. Staff who conducted quality control checks were overwhelmed by the volume of problems they were finding. After repeatedly notifying Ventavia of these problems, the regional director, Brook Jackson, emailed a complaint to the US Food and Drug Administration (FDA). Ventavia fired her later the same day. Jackson has provided The BMJ with dozens of internal company documents, photos, audio recordings, and emails.
Poor laboratory management
On its website Ventavia calls itself the largest privately owned clinical research company in Texas and lists many awards it has won for its contract work.2 But Jackson has told The BMJ that, during the two weeks she was employed at Ventavia in September 2020, she repeatedly informed her superiors of poor laboratory management, patient safety concerns, and data integrity issues. Jackson was a trained clinical trial auditor who previously held a director of operations position and came to Ventavia with more than 15 years’ experience in clinical research coordination and management. Exasperated that Ventavia was not dealing with the problems, Jackson documented several matters late one night, taking photos on her mobile phone. One photo, provided to The BMJ, showed needles discarded in a plastic biohazard bag instead of a sharps container box. Another showed vaccine packaging materials with trial participants’ identification numbers written on them left out in the open, potentially unblinding participants. Ventavia executives later questioned Jackson for taking the photos.
Early and inadvertent unblinding may have occurred on a far wider scale. According to the trial’s design, unblinded staff were responsible for preparing and administering the study drug (Pfizer’s vaccine or a placebo). This was to be done to preserve the blinding of trial participants and all other site staff, including the principal investigator. However, at Ventavia, Jackson told The BMJ that drug assignment confirmation printouts were being left in participants’ charts, accessible to blinded personnel. As a corrective action taken in September, two months into trial recruitment and with around 1000 participants already enrolled, quality assurance checklists were updated with instructions for staff to remove drug assignments from charts.
In a recording of a meeting in late September2020 between Jackson and two directors a Ventavia executive can be heard explaining that the company wasn’t able to quantify the types and number of errors they were finding when examining the trial paperwork for quality control. “In my mind, it’s something new every day,” a Ventavia executive says. “We know that it’s significant.”
Ventavia was not keeping up with data entry queries, shows an email sent by ICON, the contract research organisation with which Pfizer partnered on the trial. ICON reminded Ventavia in a September 2020 email: “The expectation for this study is that all queries are addressed within 24hrs.” ICON then highlighted over 100 outstanding queries older than three days in yellow. Examples included two individuals for which “Subject has reported with Severe symptoms/reactions … Per protocol, subjects experiencing Grade 3 local reactions should be contacted. Please confirm if an UNPLANNED CONTACT was made and update the corresponding form as appropriate.” According to the trial protocol a telephone contact should have occurred “to ascertain further details and determine whether a site visit is clinically indicated.”
TGA requests information from Pfizer after medical journal alleges contractor ‘falsified’ safety data
An investigation by a respected medical journal has alleged serious issues with Pfizer’s vaccine safety trials, including claims of “falsified data”.
Australia’s medicines regulator has sought additional information from Pfizer after an investigation by the British Medical Journal alleged serious issues with a small number of its vaccine safety trials, including claims of “falsified data” and slowness following up on adverse reactions.
The Therapeutic Goods Administration (TGA) has stressed that Pfizer’s vaccine is “highly safe and effective”, and that Australians “should not be concerned about the issues raised in the article”.
The BMJ’s report, published last week, centred on a former employee of Ventavia Research Group, a Texas-based contractor involved in the phase-three trials for Pfizer’s Covid vaccine last year.
According to Brook Jackson, a former regional director at Ventavia, the company “falsified data, unblinded patients, employed inadequately trained vaccinators, and was slow to follow up on adverse events”, the BMJ reported.