by Lyn Redwood, R.N., M.S.N.
Executive Director, World Mercury Project 
Recently, top-tier autoimmunity researchers described vaccine safety science as a “hazardous occupation .”
In their view, this is because uncompromising vaccine proponents are instantly ready to mount vociferous personal attacks on anyone who raises questions about any aspect of vaccine safety, even if the questions are buttressed by impeccable, high-quality science.
Vaccine safety was not always such a taboo topic. In 1961 , a leading polio researcher put forth the view in Science that “even after licensing, a new vaccine product must be considered to be on trial” because of the many “new variables” that accompany large-scale vaccine production and rollout.
A leading Food and Drug Administration (FDA) official contended in 1999  that modern advances in vaccine technology were rapidly “outpacing researchers” ability to predict potential vaccine-related adverse events” and argued for closer attention to safety issues from the earliest stages of vaccine development.
“One of the important things is that the technology used to make these vaccines actually exceeds the science and technology to understand how these vaccines work and to predict how they will work,” stated Dr. Peter Patriarca, MD, Director of the Viral Products Division of the FDA Center for Biological Evaluation and Research (CBER).
“So this has the potential for ending up in a situation which I call a ‘black box’ vaccine referring to a situation of unforeseen and unpredictable vaccine outcomes.”
Dr. Patriarca also voiced concerns that with live attenuated vaccines
“there is the potential for these vaccines, many of which have been poorly characterized, to recombine with viruses that may be present in the vaccine.
Some of these viruses are latent and persist for a while, so it is very important to assure that these things are safe before they are given to people.”
In the two decades since the FDA official’s prescient words of warning, numerous published studies have highlighted vaccine safety concerns that were either unexplored or neglected prior to the introduction of the vaccines in question.
Studies also highlight major gaps in the methods , protocols and timelines used to assess vaccine safety.
First rotavirus vaccine debacle
The checkered history of rotavirus vaccines in the U.S. confirms the vital need for new vaccines to remain “on trial” after their launch in the general population.
In 1998, the U.S. government licensed the first rotavirus vaccine, RotaShield, a tetravalent live-attenuated vaccine that used a genetically engineered rhesus monkey rotavirus  along with three rhesus-human reassortant  viruses.
Other rhesus-based rotavirus vaccines previously had “failed to prove safe  for administration in infants.”
According to a detailed account  of RotaShield in the Milbank Quarterly, the vaccine’s manufacturer, Wyeth, bragged about the vaccine as one of its “new, breakthrough therapies” and expressed the hope of establishing a large, profitable market  in the U.S. as a prelude to marketing RotaShield in developing countries.
Despite the initial optimism, Wyeth had to commercially withdraw RotaShield one year later, when reports to the Vaccine Adverse Events Reporting System (VAERS) pointed to a substantially increased risk of bowel intussusception, a potentially fatal (though usually rare) condition involving intestinal enfolding and obstruction.
For infants in their first year of life, intussusception risks increased 20 to 30 times  within two weeks of receiving the first dose of RotaShield.
According to the Milbank Quarterly description, a 1997 pre-licensing regulatory review meeting led by the FDA’s Vaccines and Related Biological Products Advisory Committee had given Wyeth’s hired hand (a university professor) “a minute or two maximum” to discuss intussusception risks.
There were “no follow-up questions…and no further discussion…during the remainder of the meeting,” despite the scientist’s expressed concern that “with larger numbers perhaps a causal relationship might emerge.”
Nor did attendees consider intussusception at subsequent meetings of the Centers for Disease Control and Prevention’s (CDC’s) Advisory Committee on Immunization Practices (ACIP), where, despite the professor sharing her intussusception data, vaccine cost-effectiveness was the focus of discussion.
It was not until an estimated 500,000 children received at least one million doses of RotaShield that the FDA suspended the vaccine, at first temporarily and then permanently, without ever explaining the “precise mechanism ” by which RotaShield caused intussusception.
Ironically, the government subsequently trumpeted the RotaShield story as proof  that “the systems established to detect and respond to vaccine safety concerns are effective.”
The second rotavirus vaccine debacle
Two new genetically engineered oral rotavirus vaccines entered the vaccine marketplace in 2006 and 2008, respectively: RotaTeq, a pentavalent (five-strain) bovine-human reassortant rotavirus vaccine made by Merck, and Rotarix, a live-attenuated single-human-strain rotavirus vaccine manufactured by GlaxoSmithKline (GSK).
Although pre-licensure trials found no evidence of an association between the two vaccines and intussusception, post-licensure monitoring later indicated a statistically significant increased risk of intussusception events for all rotavirus vaccines .
Unlike with RotaShield, FDA merely instructed Merck, in 2013 , and GSK, in 2014 , to update their labeling and prescribing information to include brief statements about increased intussusception risks but otherwise allowed the two vaccines to remain on the market.
Meanwhile, the much-vaunted industry and governmental safety systems that ushered the two rotavirus vaccines to market failed to detect an additional and highly concerning problem, which an academic research team “unexpectedly ” identified in 2010.
While conducting “a novel, highly sensitive analysis not routinely used for adventitious agent screening,” the researchers discovered that RotaTeq and Rotarix were contaminated with DNA from two porcine circoviruses —PCV1 (in Rotarix) and both PCV1 and PCV2 (in RotaTeq). Both GSK  and Merck  later confirmed these findings. The PCV2 pathogen is associated with severe wasting and immunodeficiency in pigs.
Although the short- and long-term dangers from PCV1 and PCV2 are as yet unknown, the pioneers of genetic engineering foresaw horizontal gene transfer—the direct uptake and incorporation of genetic material from unrelated species—as a clear risk  of genetically engineered vaccines.
Unlike chemical pollutants, nucleic acids are infectious and can invade cells and genomes, multiplying, mutating and recombining indefinitely.
Potential hazards of horizontal gene transfer include generation of new disease-causing viruses and bacteria (or reactivation of dormant viruses); spread of drug and antibiotic resistance genes among viral and bacterial pathogens; and random insertion into genomes of cells resulting in cancer.
At issue, in the example of RotaTeq and Rotarix, are the dangers of incorporation of adventitious PCV contaminants from live rotavirus vaccines into the human host or host-related bacteria (such as the gut flora)—dangers unrecognized and, therefore, unexplored before the two vaccines went to market.
There is also additional cause for concern based on research  demonstrating that the pathogenic potential of PCV2 to cause an AIDS-like disease in pigs is unleashed when there is simultaneous vaccine-induced immune system activation.
In light of this research, the current recommendation  to administer PCV2-contaminated rotavirus vaccine along with five other vaccines—hepatitis B (HepB), diphtheria-tetanus-acellular pertussis (DTaP), Haemophilus influenzae type b (Hib), pneumococcal conjugate (PCV) and inactivated poliovirus (IPV)—represents a high-risk scenario for disease in humans.
If the contamination had been discovered prior to licensure of the rotavirus vaccines, FDA would not have licensed the vaccines—why should it be any different now?
At a 2010 meeting  convened by FDA to discuss the PCV contamination, a GSK executive went so far as to concede that:
“evolving technologies can lead to new findings that were not known at the time of licensure.”
Nonetheless, the GSK researchers  expressed little worry, having framed the presence of the PCV DNA in their vaccine as a simple “manufacturing quality issue” rather than a safety risk.
GSK even put a positive spin on the matter, suggesting  that the PCV investigation “could serve as a model for risk assessment in the event of new technologies identifying adventitious agents in the manufacturing of other vaccines.”
Are unforeseen outcomes inevitable?
Shortly after the GSK discovery, FDA recommended  that physicians temporarily suspend use of Rotarix and switch to RotaTeq, but when Merck’s vaccine was found to contain similar contaminants, FDA reversed course and allowed continued use of both.
Instead of calling for new safety studies and completing a new risk-benefit analysis (taking into consideration that mortality from rotavirus disease in the U.S. is very low), the FDA once again reassured the public that the benefits of rotavirus vaccination outweighed any “hypothetical ” health risks of PCV contamination.
Can the assertion that the benefits outweigh the risks be taken at face value?
SV40 has been detected in the brains of deceased cancer patients who received the oral polio vaccine, and a 2002 Institute of Medicine report cited  strong biological evidence that SV40 can transform normal cells into malignant cells.
Whether the porcine circovirus contamination that afflicts the two current—and highly engineered—rotavirus vaccines will turn out to have insidious long-term health effects remains an unanswered question.
Nonetheless, history indicates that we should not be surprised when novel and difficult-to-control vaccine technologies generate unforeseen outcomes.
Read the full article at WorldMercuryProject.org. 
Comment on this article at VaccineImpact.com. 
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One of the biggest myths being propagated in the compliant mainstream media today is that doctors are either pro-vaccine or anti-vaccine, and that the anti-vaccine doctors are all “quacks.”
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In between these two extreme views, however, is where the vast majority of doctors practicing today would probably categorize their position. Many doctors who consider themselves “pro-vaccine,” for example, do not believe that every single vaccine is appropriate for every single individual.
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