Well, Injecting stuff into one's bloodstream and vaccination are two different things. Normally, vaccine is injected in a muscle, a tissue, not in a blood vessel.
And yes, flu virus (and other viruses) can (surprise!) replicate itself! And not the vaccine!
And nobody mentions brain damage (proved) from Covid, from each infection. Sure, it's because of Lockdowns, nobody ever saw that virus can infect some neurons.
And yes, flu virus (and other viruses) can (surprise!) replicate itself! And not the vaccine!