I would also suggest talking with your vet. I talked with mine, and like schnauzer mom above was told it may or may not protect. My vet also said that since I am staying in the northwest camping this year (MT, OR, and WA) and my dogs don't play with other dogs at dog parks, etc. that the shot wasn't needed.
But definitely let your vet help you make the decision. They have all the knowledge and most current info.
2001 Ford F250 7.3l converted to F350 specs
2014 Flagstaff 8528RKWS
2 - 2006 model year Border Collies