There's a few factors to take in there, surely?
The vaccinated/unvaccinated thing is nothing to do with Wimbledon. That's more to do with the rules of the country that's hosting the tournament.
I don't agree with the Russia/Belarus ban for players - the war is something they probably have nothing to do with.
US Open - Djokovic is unlikely to play in that as US don't allow unvaccinated foreign travellers.