mRNA vaccines are not really new [0]. This article [1] specifically shows that we've used the mechanisms of mRNA vaccines since the 70s, and at least modern iterations of mRNA vaccines since ~10 years ago.
Even if they were new, they're just a bunch of the same sort of genetic material that is already floating around in our bodies, not some external foreign substance that interacts with our cells.
I posted this w/r/r SSRIs below, but it’s also true for Ivermectin: the development timeline aligns largely with that of mRNA vaccines.
Vaccinated diseases, more so than other medical ailments, are subject to existing technology being “good enough” until it suddenly isn’t anymore. But that doesn’t mean new entries are untested; it means the economic envelope in which it makes sense to test them is just a different shape.
