And again, the vaccines approved in the US appear to be effective against the 5 major strains. Even the non-mRNA vaccine from Johnson & Johnson is move effective, in tests, against these variants, than the typical seasonal flu shot is against the flu.I think we have to be more specific. The mRNA vaccines appear to be effective against the commonly circulating strains including the UK variant.
What preliminary testing I have seen on the Brazil and South African variant also still showed them effective enough to prevent severe cases. The companies are working on the possibility of providing another sequence in the vaccine if needed. Genetic tracking of the virus makes it appear that the UK variant is taking over here, but not the others.
There was also a misleading paper about the Brazil variant. When an area of the Amazon previously thought to have herd immunity got a new wave, they thought the people were being reinfected with a new variant. It turned out the original estimate of herd immunity was probably wrong.
I think we're at "so far so good" with the vaccines and at this point you are not likely to be infected with a strain that jumps the vaccine. Possibly, we'll need a booster in a few months if that turns out to be a problem.