Jim, you're wrong.
Consider the current set of mutations:- Brazil, South Africa, Kent.

All 3 places where AstraZeneca tried out their vaccines.

Sorry, but it is well known and experts will back me up.. non-sterilising vaccines simply create hurdles for the virus' mutations to clear.

e.g.:
Paul Bieniasz didn’t mince words in a sarcastic New Year’s Day statement he tweeted. If he wanted to create a new, vaccine-resisting version of the pandemic coronavirus, the Rockefeller University virologist wrote, “having developed a remarkable two-dose vaccine, [I’d] … ADMINISTER IT TO MILLIONS OF PEOPLE – BUT DELAY THE SECOND DOSE. … If we let immunity wane for a little while, say 4 to 12 weeks, we just might hit the sweet spot”—and create a virus that could foil the vaccine.

or:
www.sciencemag.org/news/2021/01/could-too-much-time-between-doses-d​rive-coronavirus-outwit-vaccines

or:
[link to www.cogconsortium.uk (secure)]
Persistent SARS-CoV-2 infection and viral evolution tracked in an immunocompromised patient

I suggest you don't know what you are talking about, Jim!