I am aware of those that are completely against vaccines. I've never heard of this doctor's research saying it is unnecessary to do yearly vaccines. Even though I haven't read the research it does make me think. Who profits from unnecessary vaccinations? We as humans get our vaccinations once. We do we do it annually for dogs? Looks like they only want a profit. I give my dogs their shots with the exception of rabies. I would give that too if the law allowed me to where I live.