The below article is very reassuring with regard to the mink mutation and any potential impact on vaccines. It sounds like it is unlikely to have much effect, and in any case mutations are to be expected, it is something scientists are keeping ahead of and that it should not be difficult to adapt future vaccines to accommodate them.
www.independent.co.uk/news/health/covid-mink-denmark-mutation-animal-farm-b1720408.html
I know none of this is good for the mink, but if it helps end this industry, it will ultimately be a positive thing.