My understanding is that pseudouridination of mRNA is done to prevent mRNA from being quickly metabolized, and this causes it to continue to hijack cells to produce spike proteins. Blood from vaccinated persons is likely to contain spike proteins indefinitely, and thus is dangerous to anyone receiving it, because spike proteins are toxic. This doesn't even take into account the myriad claims that there are self-assembling nanotechnological devices besides the mRNA in LNP's (Lipid NanoParticles), which today are being alleged to be destroyed by nicotine. With no peer reviewed research into such nanotech devices in the jabs, I am unable to confirm they are there, but there is damn sure a lot of research into such devices and any other means of testing them on people would cost many $M's, at least, so I lean towards those claims being credible, just on economic grounds. There are sure no ethical barriers to pharmaceutical companies injecting people with anything.

Were I him I'd stick to purebloods for my transfusion sources.