Pfizer Vaxxine Clinical Trials Poorly Designed From the Start, Analysis Shows
By Madhava Setty, M.D.
The Canadian COVID Care Alliance assembled a presentation that demonstrates how Pfizer’s purported randomized placebo-controlled, double-blinded study veered away from methodologies that would have definitively answered questions about the vaccine’s safety and efficacy.
The disagreements around whether COVID-19 vaccinations are “safe and effective” stem not only from the subjective nature of such descriptors but also from the lack of consensus around the data used to substantiate or refute such a claim.
The Centers for Disease Control and Prevention’s (CDC) Morbidity and Mortality Weekly Reports (MMWR) often draw from limited observations, and their assessment of vaccine effectiveness is based on relatively small subsets of our population.
Their conclusions are sometimes reflective of outdated data and conflict with their own recommendations.
For example, here the CDC’s latest estimation of vaccine effectiveness is upwards of 80% in preventing COVID-19 (i.e. the risk of becoming infected is 5 times less if vaccinated). Why then the recommendation for boosters?
Note that this latest metric is based on the CDC’s most recent data from more than one month ago and represents data drawn only from 27 jurisdictions.
Eric Topol, a professor of molecular medicine at Scripps Research, is a former advisory board member of the Covid Tracking Project, a team that worked to collect and synthesize local COVID-19 during the peak of the pandemic.
Politico recently quoted Topol:
“I think we’ve done a horrible job from day one in data tracking for the pandemic. We’re not tracking all the things that we need to to get a handle on what’s going on. It is embarrassing.”
Meanwhile, vaccine injuries continue to accumulate in the Vaccine Adverse Event Reporting System (VAERS) and go unacknowledged, making any constructive discussion around risk impossible.
In order to find common ground, it is perhaps most appropriate to focus on published data from the vaccine trials themselves.
Was Emergency Use Authorization justified? Was the current confusion around vaccine effectiveness and safety predictable from the beginning?
A presentation by the Canadian COVID Care Alliance
Canadian COVID Care Alliance (CCCA) is a group of “Independent Canadian doctors, scientists and healthcare professionals committed to providing top quality and balanced evidence-based information to the Canadian public about COVID-19 so that hospitalizations can be reduced, lives saved and our country restored as safely as possible.”
CCCA assembled a presentation that comprehensively demonstrates how Pfizer’s purported randomized placebo-controlled, double-blinded study veered away from methodologies that would have answered the safety and efficacy questions definitively.
In this concise slide deck with an explanatory video, CCCA powerfully summarized why Pfizer’s trial was not designed to adequately demonstrate its product’s safety and efficacy.
Here are a few key points from the CCCA presentation:
- Initial data demonstrated a high relative risk reduction of infection yet this amounted to an absolute risk reduction of only 0.84%. It is the absolute risk reduction that determines the risk-benefit ratio required to make informed decisions around inoculation.
- Early unblinding: Several months before publishing six-month observational results Pfizer opted to offer its product to those participants who received the placebo. By eliminating nearly all participants in the placebo wing Pfizer effectively closed the curtain on its experiment because long-term comparisons can no longer be made.
- All-cause mortality and morbidity, the only sensible outcomes to use in determining efficacy and risk, were not considered. Indeed, all-cause mortality was higher in the vaccinated group after six months.
- Severe adverse events outnumbered cases of severe COVID prevented after six months of observation.
- Trial participants were not reflective of the most vulnerable members of our population — more than 50% of people dying from COVID are 75 years of age or older. This age group made up only 4.4% of trial participants. Also, 95% of those who have died from COVID had one or more comorbidities. Nearly 80% of trial participants had none.
- Not every trial participant was tested for COVID. Asymptomatic or paucisymptomatic (presenting few symptoms) cases were missed.
Questions regarding unblinding and data integrity
The CCCA presentation also resurrects a puzzling observation mentioned in a briefing document Pfizer submitted only to the FDA’s Vaccine and Related Biologic Products Advisory Committee (VRBPAC) of the FDA, but nowhere else — including the widely cited summary of the trial reported in New England Journal of Medicine.
According to the document, 3,410 participants were suspected from their clinical presentation of having COVID but they were excluded from efficacy calculations because a diagnosis could not be confirmed through PCR testing.
The CCCA presentation presumes this large group of participants was never tested. The wording in the VRBPAC briefing document is indeed vague, stating the participants were “not PCR-confirmed” in one sentence and “unconfirmed” in another.
Assuming Pfizer’s investigators followed their study protocol, these participants were in fact tested. Yet that forces us to accept that more than 3,400 participants who had symptoms of COVID were suffering from other illnesses, not COVID.
In other words, there were 3,580 participants who clinically presented with COVID (3,410 suspected and 170 confirmed). Of these, more than 95% tested negative. This is difficult to accept in a group where clinical suspicion is high.
However, with no further testing by the investigators, we are left to accept these numbers as reported.
Peter Doshi, Ph.D., senior editor at The BMJ, explained the implications of this result in detail, in an opinion piece published nearly one year ago.
In his widely discussed commentary, Doshi noted another baffling finding in the Pfizer data. Within 7 days of administration of the second of two doses, 371 (310 in the vaccinated group and 61 in the placebo group) trial participants were withdrawn from the study due to “important protocol deviations.”
Of course, protocol deviations occur, but why were five times more vaccine recipients excluded than placebo recipients at that point in the study?
Although there were nearly 40,000 participants in the evaluable population, only 170 contributed to the efficacy calculation with regard to protection from infection, and only 10 with regard to protection from severe infection.
In other words, just a handful of incorrectly diagnosed and categorized participants could easily result in a substantially different estimation of the vaccine’s efficacy and safety.
Statistician and educator Mathew Crawford pointed out the likelihood of such a disparity between groups is exceedingly unlikely. However, because the investigators should have been blinded, we must accept this as an extraordinary coincidence.
Incredibly, the very same disparity occurred in the pediatric trials (ages 5 to 11). Table 12 from the corresponding summary to the FDA’s VRBPAC indicated 3.1% of children were removed from the trial if they received the vaccine compared to 0.5% if they received the placebo.
Once again, there is a factor of 5 difference at exactly the same point in the trial (within 7 days of dose 2). It is true that the vaccine formulation requires steps prior to administration that are not required with the placebo, but why didn’t these protocol deviations happen with the first dose as well? What happened to these vaccine recipients soon after they received their second dose?
These remarkable “coincidences” can be best explained if we are willing to consider the possibility that the investigators were not, in fact, blinded. This is precisely the most damning allegation by whistleblower Brook Jackson, formerly a regional director at Ventavia, one of several clinical research organizations conducting Pfizer’s vaccine trials in 2020.
In addition to the unblinding of investigators, Jackson also accused Ventavia of falsifying data.
These are weighty accusations. Why should we believe her? Because her story is corroborated by the trial data themselves.
She was fired within a day of reporting her concerns directly to the FDA. Her story was covered in The BMJ Nov. 2. Mainstream media has yet to report on it.
Though public health authorities continue to proclaim these products are safe and effective, every week brings more and more evidence to the contrary.
A thorough analysis of data from Pfizer’s vaccine trials reveals more questions than answers. Claims the vaccine maker’s product is performing “as expected” may not be so far from the truth.
420 total views