Likehood of mutation might be, but spread of variants is a more complicated function. Vaccination for sure might affect how likely one variant predominates agai

Likehood of mutation might be, but spread of variants is a more complicated function. Vaccination for sure might affect how likely one variant predominates against others. Considering cross-immunization between variants with natural immunity, it might be more efficient to refrain from vaccines to give cross-immunity with a weaker variant.