Jim, if the vaccine does not sterilise or stop transmission, then the scatter-gun mutations which escape the vaccine will be the ones to 'survive' and transmit.
Use your noggin!

PS - the prion stuff is verifiable by yourself, and entirely plausible. Prion-warfare has been researched and this shows us the acute phase of 'flu' is simply the cover.. the real payload is likely the neuro-degenerative diseases in 1-2yrs time.

Go ahead, though, get youself a dose of those prion-genesis sites. They will distribute throughout your body from the muscular injection site and cross just fine from your blood into your CNS.

EDIT: you can't fight this with 'vaccines' which don't stop virus replication or transmission to new hosts. You need sterilising drugs.