Moderna acknowledges that its vaccine caused skeletal deformations in rat embryos

Judicial Watch published reports that pharmaceutical company had submitted to the FDA about its experiments on pregnant rodents.

Rat pups whose mothers experimentally received Moderna’s Covid-19 vaccine developed skeletal deformities. This was reported by the pharmaceutical company itself to the Food and Drug Administration (FDA) in documents accessed by Judicial Watch. Health authorities have been recommending pregnant women get vaccinated since 2021 due to their increased risk of complications from the infection.

In the 699 pages submitted by the Department of Health and Human Services to Judicial Watch, Moderna pointed out that "a 'statistically significant' number of rats were born with skeletal deformities after their mothers were injected with the vaccine." However, the company determined that these abnormalities "were not considered adverse" since "skeletal variations are structural changes that do not affect the development or function of a developing embryo, they are considered reversible".

Non-clinical summary

Unlike Pfizer, which killed the rats which it tested its vaccine on, Moderna kept pregnant rodents alive to test the embryos. In a "non-clinical summary" included in the documentation received by the group, Moderna indicated the frequency and type of abnormalities that appeared in these offspring:

The mRNA-1273-related variations in skeletal examination included statistically significant increases in the number of F1 rats with 1 or more wavy ribs and 1 or more rib nodules. Wavy ribs appeared in 6 fetuses and 4 litters with a fetal prevalence of 4.03% and a litter prevalence of 18.2%. Rib nodules appeared in 5 of those 6 fetuses.

Possibility of developing more serious pathologies

Something that, according to Judicial Watch, is not correct, According to the July 2009 Environmental Research article, "Dose-response relationships of rat fetal skeletal variations: Relevance to risk assessment."

Whether or not a substance-induced increase in the incidence of fetal skeleton variations should be taken into account for human risk assessment is a long-standing controversial issue. It has been argued that chemical-produced increases in variations are not to be considered for risk assessment because they are “unlikely to adversely affect survival or health.” The counter argument is that even not being overtly adverse and conveying no apparent selective disadvantage, a treatment-induced increase in the occurrence of variations means that the chemical agent has the potential to perturb skeleton development. According to this view, under a different condition of exposure, or in another species, this perturbation of normal bone formation may give rise to a different and more severe outcome.

Freedom of Information Act

Judicial Watch received the documents after filing a Freedom of Information Act lawsuit in 2021 after failing to receive requested submissions from the FDA, the Centers for Disease Control and Prevention (CDC) and the National Institute of Allergy and Infectious Diseases (NIAID). The president of the organization, Tom Fitton, stressed that "the fact that it took a federal lawsuit to gain access to this material is yet another scandal.”