One reason I've seen is that the companies behind the vaccine have not actually disclosed how the mRNA gets inside the cell. They have said its some type of nan

One reason I've seen is that the companies behind the vaccine have not actually disclosed how the mRNA gets inside the cell. They have said its some type of nanoparticle lipid mixture that is able to get inside your cells, but they haven't disclosed publicly or to the review panels what it actually is or how its made, since its proprietary tech. [0] Back in 2017, Moderna was taking a similar approach, wrapping the mRNA in lipid nanoparticles, but found that it had safety issues, and never made it to human trials. [1] Hopefully they have fixed their problems, but nothing I've seen has outright proven that its safe over the long term. Personally, I can kind of understand this reasoning, I would prefer to know exactly what is going into my body and how its made, and that information should absolutely be made open. Something I also wonder is that moderna had a bunch of mRNA vaccines set to go to human trials, and I wonder where they went. [2] [0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7553041/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7553041/ [1] https://www.statnews.com/2017/01/10/moderna-trouble-mrna/ https://www.statnews.com/2017/01/10/moderna-trouble-mrna/ [2] https://www.biospace.com/article/why-secretive-5-billion-biotech-moderna-may-not-be-able-to-commercialize-products-into-clinical-trials-/ https://www.biospace.com/article/why-secretive-5-billion-bio...