It certainly doesn’t mean you need to re-vaccinate your dog; the logic of this suggestion, which I’ve seen dozens of times in the last two days, really escapes me, since if the vaccine works against this strain (which it does), your dog is already immune, and if it doesn’t, re-vaccinating him won’t do anything.
In other words, folks, if the existing vaccine didn’t cover the new strain (which it does), re-vaccinating your dog with the existing vaccine wouldn’t make one **** bit of difference. It would literally be no better than throwing a virgin in a volcano to placate the fates.