>...that sounds like a much better breeding ground for continued spread and mutation... Actually, that's already been studied. The virus mutates far less in br

>...that sounds like a much better breeding ground for continued spread and mutation... Actually, that's already been studied. The virus mutates far less in breakthrough infections among vaccinated individuals than in infected individuals. COVID-19 vaccines dampen genomic diversity of SARS-CoV-2: Unvaccinated patients exhibit more antigenic mutational variance: https://www.medrxiv.org/content/10.1101/2021.07.01.21259833v1 https://www.medrxiv.org/content/10.1101/2021.07.01.21259833v... >...The societal benefit of mass vaccination may consequently go far beyond the widely reported mitigation of SARS-CoV-2 infection risk and amelioration of community transmission, to include stemming of rampant viral evolution.