> mRNA vaccines have been around for ~40 years with pretty well identified side-effects and risk profiles I'm having trouble reconciling your statement with Wi

> mRNA vaccines have been around for ~40 years with pretty well identified side-effects and risk profiles I'm having trouble reconciling your statement with Wikipedia's claim that the Pfizer vaccine is "the first mRNA vaccine to be authorized for use in humans" https://en.wikipedia.org/wiki/Pfizer%E2%80%93BioNTech_COVID-19_vaccine#Expedited https://en.wikipedia.org/wiki/Pfizer%E2%80%93BioNTech_COVID-...