Well, thanks for trying, I suppose. If you have some actual reference which indicates that PEG coated nanoparticles have a short half life in vivo, I’d like to see it.
How long the microscopic amount of one the lipid coating ingredients, PEG may or may not remain in the body beyond a few days is irrelevant. How long the mRNA stays viable is.
It was you that claimed the mRNA expressed spiked protein could last a lifetime lol.