German Chemists Write Letter to BioNTech Asking About ‘Impurities’ Causing Pfizer Vax to Turn a Concerning ‘Shade of Gray’: ‘Components Not Approved for Human Use’

“There is a suspicion that something has gone wrong.”

By Jon Fleetwood – Jan 28, 2022


  • Four renowned German chemistry professors sent a list of questions to BioNTech founder Ugur Sahin because they are concerned about the pharmaceutical company’s Covid-19 vaccine’s “shade of gray” coloration possibly being an indication of having been contaminated with “impurities,” according to the German newspaper Berliner Zeitung.
  • The scientists include Jörg Matysik, Professor of Analytical Chemistry at the University of Leipzig; Gerald Dyker, Professor of Organic Chemistry at the Ruhr University Bochum; Andreas Schnepf, Professor of Inorganic Chemistry at the University of Tübingen; and Martin Winkler, Professor of Materials and Process Engineering at the Zurich University of Applied Sciences.
  • While the chemists write in their letter to BioNTech that they find mRNA technology used in BioNTech’s vaccine formulation “very exciting” and “very promising,” the four scientists nevertheless worry about the fact that the vaccine’s package insert says the vaccine is supposed to be “white to off-white” in color, but upon inspection the vaccine is a visible “shade of gray.”
  • “How does this significant color difference come about? Almost all substances used are colorless, so white would be expected,” the scientists state in the letter. “Where does the shade of gray come from? Are these impurities?”
  • The chemists also worried the vaccine contains “components not approved for human use,” according to the letter.
  • Finally, the scientists cite concern for the differing “side effects” that result among individuals who receive jabs from different lot numbers. “It really shouldn’t be, because all the cans have to contain the same stuff,” the scientists argued.
  • The researchers wondered why different vaccine batches are not producing uniform side effects, whether this fact can be explained by BioNTech, what distinguishes these batches from others, and whether there are efforts underway to “investigate this important aspect more closely.”
  • “Are there or are clinical studies planned to investigate the side effects and their causes and to increase the safety of the new Covid vaccines?” the scientists asked BioNTech.


University of Tübingen professor Andreas Schnepf explains the problem: “It’s possible that a pill, a liquid or a dispersion is colored. But the color grey [in the Pfizer-BioNTech vaccine liquid], i.e. a “diluted black”, is hardly created in a process that would have been expected. We need to know if it is a contamination. With a pill that is not white, there is a suspicion that something has gone wrong. We need clarification from BionTech here.”


  • BioNTech is a German biotechnology company based in Mainz that develops and manufactures the popular Pfizer Covid-19 vaccine.
  • The four scientists also noted in their letter how after discussion among their colleagues so far, they have yet “been able to find any starting points on how to ensure the quality of mRNA technology for such a large volume of a product.”
  • “Some side effects occur quickly after vaccination, much faster than one would expect if they were related to the formation of the spike protein,” wrote the chemists. “A toxic or allergic reaction would be more likely here, which could be narrowed down by further investigations into the ingredients.”
  • Recently, Pfizer asked a federal court to let it intervene in a high-profile case that has seen U.S. drug regulators try to slow-walk disclosure of safety data on Pfizer’s Covid-19 vaccine.
  • Pfizer “seeks leave to intervene in this action for the limited purpose of ensuring that information exempt from disclosure under FOIA is adequately protected as FDA complies with this Court’s order,” the memorandum supporting the motion for leave to intervene stated, The Epoch Times reports.
  • Plaintiffs are concerned that Pfizer’s involvement will lead to the FDA renewing effort to delay production of the vaccine data.
  • The vaccine has since proven to provide little protection against infection and its effectiveness against severe illness has dropped, and some side effects linked to the vaccine were detected post-authorization, including heart inflammation and severe allergic reactions, Epoch Times also notes.

American Faith