No mRNA vaccine has been approved before, but from clinical trials of mRNA vaccines dating back to 2008 [1] there’s evidence of short-term side effects but no r

No mRNA vaccine has been approved before, but from clinical trials of mRNA vaccines dating back to 2008 [1] there’s evidence of short-term side effects but no reason to suspect long-term safety concerns. mRNA vaccines don’t present the risk that attenuated vaccines pose to immunocompromised individuals or pregnant women, and they don’t stay in the body long enough to be a long-term threat. We can’t guarantee 100% because our bodies are complex, but I wouldn’t characterize it as “significant increased risk” for people under (or over) 40. [1]: https://www.nature.com/articles/nrd.2017.243/tables/2 https://www.nature.com/articles/nrd.2017.243/tables/2