what? lol. no none of this is true. virus survive all the time - it's just that herd immunity preclude them from being an outbreak.
vaxxes are an impediment to host replication- one way for a virus to profligate is to mutate around the vaxx induced antibodies and then ( Darwins law) become a resistant variant/strain to the vaxx
Oh, of course I forgot to mention that viruses can remain viable when morons refuse to vaccinate.