Pathogens mutate when they can no longer infect their preferred host. If humans are the preferred host, it is the vaccinated that can no longer be infected. The response of the pathogen is to mutate in order to find a way around the vaccine. The unvaccinated are the ideal host because there’s no need to mutate!
As usual the forces of evil are lying. The only use for this so-called study is to start a fire in the wood stove.