Hmmm . . . my vet, whom I regard as very smart and up to date, said when I asked him about it several weeks ago that the vaccine is pretty much a scam to make money for the vaccine company and play on people's flu fears -- that it's not very effective and that "canine influenza" has been around for a good while without people getting all worked up about it. He said that dogs in shelters and others confined in close quarters (like track kennels) that way are the ones with a significant risk, not really pets. Now I'm wondering if I should reconsider, though....