They knew before Jan 8 2021 that COVID-19 will negatively stimulate your immune system.
Published online 2021 Jan 8
Do COVID-19 RNA-based vaccines put at risk of immune-mediated diseases? In reply to “potential antigenic cross-reactivity between SARS-CoV-2 and human tissue with a possible link to an increase in autoimmune diseases”
To the Editor,
I read with great interest the article by Vojdani et al. [1], concerning the hypothesis of a molecular mimicry mechanism between the nucleoprotein/spike protein of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) and self-antigens. Viruses are notoriously involved in the pathogenesis of autoimmune diseases [2], and the authors reasonably conclude that such a cross-reactivity might lead to the development of immune-mediated disorders in COronaVirus Disease-19 (COVID-19) patients in the long term. The authors also suggest that a similar scenario might take place following COVID-19 vaccination.
Vaccine-associated autoimmunity is a well-known phenomenon attributed to either the cross-reactivity between antigens or the effect of adjuvant [3]. When coming to COVID-19 vaccine, this matter is further complicated by the nucleic acid formulation and the accelerated development process imposed by the emergency pandemic situation [4]. Currently, lipid nanoparticle-formulated mRNA vaccines coding for the SARS-CoV-2 full-length spike protein have shown the highest level of evidence according to the efficacy and safety profile in clinical trials, being therefore authorized and recommended for use in the United States and Europe. Although the results from phase I and II/III studies have not raised serious safety concerns [5], the time of observation was extremely short and the target population not defined. Reported local and systemic adverse events seemed to be dose-dependent and more common in participants aged under 55 years. These results presumably depend on the higher reactogenicity occurring in younger people that may confer greater protection towards viral antigens but also predispose to a higher burden of immunological side effects.
The reactogenicity of COVID-19 mRNA vaccine in individuals suffering from immune-mediated diseases and having therefore a pre-existent dysregulation of the immune response has not been investigated. It may be hypothesized that immunosuppressive agents prescribed to these patients mitigate or even prevent side effects related to vaccine immunogenicity.
Besides the mechanism of molecular mimicry, mRNA vaccines may give rise to a cascade of immunological events eventually leading to the aberrant activation of the innate and acquired immune system.
RNA vaccines have been principally designed for cancer and infectious diseases. This innovative therapeutic approach is based on the synthesis of RNA chains coding for desired antigenic proteins and exploits the intrinsic immunogenicity of nucleic acids. In order to avoid degradation by RNases, RNA can be encapsulated in nanoparticles or liposomes, which deliver the cargo inside target cells following a process of endocytosis. mRNA is then translated into immunogenic proteins by cell ribosomal machinery [6].
However, prior to the translation, mRNA may bind pattern recognition receptors (PRRs) in endosomes or cytosol. Toll-like receptor (TLR)3, TLR7 and TLR8 are able to recognize chains of double-stranded (ds)RNA or single-stranded (ss)RNA in endosomes, while retinoic acid-inducible gene-I (RIG-I) and melanoma differentiation-associated protein 5 (MDA5) may detect short and long filaments of dsRNA in the cytosol. The final result is the activation of several pro-inflammatory cascades, including the assembly of inflammasome platforms, the type I interferon (IFN) response and the nuclear translocation of the transcription factor nuclear factor (NF)-kB [7].
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7833091/
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