Unverified Research Claims Vaccines Curb New Viral Mutations

Reuters cited a study to claim vaccines are curbing COVID-causing viral mutations. I dig into the claims to show they are nothing more than unauthentic junk science. Relevant links are included below.
https://www.yahoo.com/news/vaccines-may-curb-virus-mutations-162917356.html
https://www.medrxiv.org/content/10.1101/2021.07.01.21259833v1.full-text
https://www.medrxiv.org/content/what-unrefereed-preprint
https://nference.ai/