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 vesse

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!