FAQ: Coronavirus vaccines Frequently Asked Questions

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There is an updated version of this article here.

Is there any scientific possibility that the Pfizer and Moderna vaccines will change human DNA?

No. Both these vaccines employ molecules called messenger RNA that have been synthesised in laboratories. After immunisation the molecules are designed to enter into cells within the body where they give the molecular instructions for those cells to produce the coronavirus spike protein. This is then released into the blood stream causing the body’s natural immune mechanisms to generate antibodies and immune cells against the spike protein. As a result the individual becomes immune to the coronavirus. The messenger RNA molecules themselves only survive in the body for a matter of hours following immunisation and they are then destroyed by normal cellular mechanisms. There is no scientific or biological possibility that the messenger RNA molecules in the new vaccines are capable of changing human DNA. There is a completely different class of virus, called retroviruses, which do carry the ability to alter human DNA, and analysis of the human genetic code suggests that a significant part of our DNA originated in ancient retroviruses.

Is it true that the new covid vaccines have not undergone normal safety testing procedures?

No. The new covid vaccines have undergone the same extensive independent testing and scrutiny that all new medications must undergo in developed countries. All the candidate vaccines have been tested in carefully designed large Phase 3 ‘double blind’ studies which investigate the safety and efficacy of the vaccine compared with a harmless placebo. The results of the studies have been analysed by large numbers of independent experts and much of the data have been made publically available to scientists around the world. At the time in December 2020 that the Pfizer and Moderna vaccines were approved tens of thousands of people had received both vaccines without any serious side effects.

It is true that the vaccine development, testing and approval process has occurred much faster than normal, but this is because there have been extraordinary levels of focussed international scientific effort, massive funding and unprecedented cooperation between experts. Since mass immunisation campaigns started in December 2020 hundreds of thousands of people have already received the vaccine and detailed analysis of possible side effects is continuing. Although no biologically effective medication can ever be regarded as completely safe, the available data indicate that the Pfizer and Moderna vaccines have excellent safety records, and they are in fact far safer than many medications such as aspirin and ibuprofen which are in common use.  

Is there hidden collusion between Western governments and big pharmaceutical companies to hide adverse effects of the vaccines?

This concern has been amplified by the recent news that the UK Government granted the pharmaceutical company Pfizer a legal indemnity protecting it from legal action as a result of any problems with the vaccine. NHS staff providing the vaccine, as well as manufacturers of the drug, are also protected. It is important to understand that the assessment of safety and efficacy of all new medications is undertaken by a large number of independent and highly experienced academic scientists who are independent of both government control and payment by pharmaceutical companies. All the scientists involved are aware that their integrity and international reputations depend totally on being seen to be honest, truthful and unbiased. If it subsequently became apparent that there had been some dishonesty or deception their careers and reputations would be destroyed. From my personal experience of running a randomised clinical trial that was supervised under the same UK and US regulation I am confident that the information that has been made publically available on safety of the vaccines is as honest and accurate as possible.

The motivation for providing indemnity to the pharmaceutical companies is that literally billions of doses are intended to be given over the next few months. If extremely rare but serious side effects emerge, the potential litigation costs would rapidly bankrupt the companies despite their immense capitalisation. In order to protect their shareholders’ interests the companies would have a duty to halt all vaccination around the world (possibly for months or years) as soon as the first serious side effect was announced. In order to prevent this possibility the UK Government has taken on legal responsibility. So legal protections remain for participants but it is the government (ie taxpayers) who will have to pay. In fact according to the Vaccine Damages Payments Act there will be a one-off payment of £120,000 to any person which is permanently disabled or harmed as a result of the vaccine. Similar arrangements have been made for previous vaccines such as the pertussis (whooping cough) vaccine.

Is it true that the new covid vaccines contain tissues from an aborted fetus?

No. The Pfizer and Moderna vaccines employ messenger RNA molecules which have been synthesised artificially in laboratories. However as part of the vaccine development process the vaccines were tested using a so-called ‘immortal’ cell-line called HEK-293. This cell line consists of continually multiplying cells which have been multiplying for more than 40 years. The original cells were said to have been obtained from a fetus (unborn baby) who underwent a legal abortion for other reasons in the Netherlands in 1973. No further abortions were performed as part of the vaccine development process and the vaccines do not contain any fetal tissue. The use of the HEK-293 cell-line does raise the question of whether the vaccine might be regarded as ‘morally tainted’. This is a complex question which I have discussed in an article called ‘Coronavirus vaccines and Christian Ethics’. At present there is no generally available coronavirus vaccine that has not been developed using HEK-293 cells.

Is it true that the risks of coronavirus infection have been massively exaggerated for political or other devious reasons?

No. There is a consensus amongst epidemiologists, virologists and infectious disease experts around the world that the current Covid-19 pandemic is the most dangerous global health emergency since the Spanish influenza in 1918/19. There is already clear evidence that 2020 has seen hundreds of thousands of excess deaths that would not have occurred without the pandemic. In addition to the tragic deaths, there is growing evidence of very significant long-lasting complications in some survivors including strokes, heart problems, chronic lung conditions and even long-lasting cognitive impairment. It now seems likely that many thousands if not millions of people will be living with the medical complications of coronavirus infection for years to come.

Is it true that the coronavirus vaccines use covert surveillance techniques created by Bill Gates?

No. None of the vaccines approved by regulatory authorities use covert surveillance techniques. Like many conspiracy theories, this one has its origin in a genuine news item. In December 2019 a group of US researchers who were funded by the Bill and Melinda Gates Foundation published a research paper about a technology that was capable of placing a vaccination record on a patient’s skin using a smart-ink that could then be read by a smartphone. The research was not related to the coronavirus pandemic and the technology has not been further developed or implemented as yet.

Is it true that Western democratic governments are planning to make coronavirus vaccination compulsory?

No. At the time of writing no Western democratic governments have revealed plans to make vaccination compulsory. There are very strong legal and historic protections for individual liberty and conscience in most of these countries, and only totalitarian governments are likely to enforce vaccination. However it is likely that there will be public campaigns to persuade as many people as possible to receive vaccination in order to raise the levels of immunity within the population as a whole.

Is it true that coronavirus vaccination may lead to infertility?

There is no strong scientific evidence to support this possibility. The existing clinical trials excluded pregnant women but this is standard practice in all clinical trials, to avoid the remote possibility that a new medication might cause unanticipated damage to an unborn baby. The current UK advice is that people who are pregnant, breastfeeding, or who may get pregnant within three months of their first dose should not receive the vaccine, but this is out of concern for possible risks to the baby, not because of a risk of infertility.

It has been suggested that there is a small overlap in the amino acid sequences of the coronavirus spike protein and an important placental protein called syncytin-1. Hence if the body creates antibodies against the spike protein they might inadvertently attack the placental protein. This is a theoretical possibility that remains entirely speculative and most experts in the area think it is extremely unlikely. If the mechanism turns out to be true then it is theoretically possible that infection with the natural coronavirus might inadvertently lead to later infertility. However there is absolutely no evidence to support this at present.

Is it true that volunteers have died as a result of receiving experimental coronavirus vaccines?

There were two deaths amongst the 21,000 people who received the Pfizer vaccine but after extensive investigation by independent scientists they were determined to be unrelated, chance events. For comparison there were four deaths that occurred by chance in the 21,000 people who received the inactive placebo, so one might conclude that being injected with salt water was more dangerous than receiving the vaccine!

Shortly following the commencement of immunisation with the Pfizer vaccine in the UK two health professionals, who both had a previous a history of life-threatening allergy, developed serious allergic responses to the vaccine. It appears that the two individuals did not suffer lasting ill-effects, but the UK advice was modified following these incidents to recommend that people with a history of very severe allergic responses (called anaphylaxis) should not receive the vaccine. 

Is it true that the virus mutates so rapidly that vaccines will become rapidly ineffective?

It is well known that the influenza virus mutates continuously and hence a new influenza vaccine has to be developed every year. At present the evidence suggests that the Covid-19 virus is more genetically stable than the influenza virus and experts hope that the current vaccines will remain active for longer than one year. However there is simply not enough experience with the Covid-19 virus to be able to predict the likelihood of future mutations.

This post originally featured on johnwyatt.com.
Posted with permission.


  1. P. S. Govender on 4 January 2021 at 7:22 pm

    Thank you for this unbiased information. We trust that with the advent of time and future research that the general public will be kept informed. I do not believe that scientists should bear the blame for any cheap politicization of this pandemic. May God grant you the wisdom and the strength to pursue the search for the best vaccine in the best interest of all humanity.

    • P. S. Govender on 4 January 2021 at 7:26 pm

      Thank you for this unbiased information. We trust that with the advent of time and future research that the general public will be kept informed. I do not believe that scientists should bear the blame for any cheap politicization of this pandemic. May God grant you the wisdom and the strength to pursue the search for the best vaccine in the best interest of all humanity.

  2. […] FAQ: Coronavirus vaccines Frequently Asked Questions […]

  3. Dr Nicola Skrinchuk on 20 January 2021 at 12:25 am

    Thank you so much Prof. Wyatt. You answered the question as to whether or not the Pfizer and Moderna vaccines will change human DNA but omitted the obvious vaccine by Oxford-AstraZeneca which is a DNA based vaccination. Will THIS change human DNA? How does it compare to changes made by other naturally occurring DNA viruses such as the flu and herpes viruses? Are these changes in somatic cells only? Many thanks.

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