The previous average vaccine testing duration was ~5 years. Let's not pretend that the mRNA vaccines were even close to that.
Fun fact, the Omicron BA.5 booster isn't tested at all.
Fun fact, the Omicron BA.5 booster isn't tested at all.
The "decades of public use" metric needs to also take into account how widespread that use is.
Now consider how many doses of mRNA vaccines have been given worldwide (1), since the public rollouts began in December 2020. mRNA vaccines are no longer unknown, at all.
1) Billions of doses https://www.bloomberg.com/graphics/covid-vaccine-tracker-glo...