[captain_dave]

I would think the mRNA based vaccines are the most dangerous because they are the most unknown

[GaryCrow]

I would think the mRNA based vaccines are the most dangerous because they are the most unknown

The russians can't even make a washing machine that works, there's no way I'm getting anywhere near any vaccine from them.

[Svartalfiar]

I would think the mRNA based vaccines are the most dangerous because they are the most unknown

Dangerous isn't the word you're looking for. They could be, or they might not be. Until we know more, you can't say how dangerous they are. A better term would be 'risk' - these are certainly more risky, because you don't know the possible dangers, or just how dangerous those dangers might be.