He means the COVID vaccine but knows people will make fun of him if he says what he actually believes so he's playing pretend like there is some plague of untested vaccines being used instead of there being one fast tracked vaccine deployed in response to a massive pandemic
Indeed, but that’s not the point: many anti-vaxxers are against all vaccines, irrespective of how they were tested. (And will argue against e.g. the FRA approvals.)
Okay; noting that the argument has moved from "untested" to "relatively untested".
To clarify, is your concern the inadequacy of the approval process FDA uses for (all) vaccines (noting that many vaccines --e.g. influenza-- are refreshed on a fairly regular basis to account for new strains of viruses) or something specific to approval of the MRNA vaccines?
Or is it that MRNA vaccines were a new approach for vaccines more generally, and so there wasn't/isn't the same long-term data that there was/is for multiple generations of vaccines based on older technologies (viral vector, toxoid, etc.)?
I disagree; "untested" is a very definitive statement. Not tested. Especially when it's in a thread discussing people using all manner of less tested or sometimes literally untested peptides. (Hence my initial thought that maybe you were aware of people taking a DIY route that I wasn't.)
Anyway, when discussing a subject so popularly controversial as vaccines, it's probably better to be precise.