>>tomp+(OP)
The vaccines
do work on variants [0] with different degrees of efficacy. This actually demonstrates that the virus - after infecting millions of people over a year - hasn't significantly changed the spike protein.
Also: major changes in he spike protein could impact the ability of the virus to infect humans, so -- there is that.
[0] https://www.nejm.org/doi/10.1056/NEJMc2104974