“Well then, ask your sister about why so many pet owners have their elderly dogs titer tested to prove immunity rather than subjecting them to a vaccination”
Oh yeah, right. ONE disease in dogs that only have a few years left. Like that proves a point.
“It’s well-known that vaccination stresses the immune system of even healthy animals.”
DUH! That is the WHOLE POINT OF VACCINATION! If it did not stress them it would not provide immunity.
“as well as vaccination more frequently than is necessary to maintain immunity to a given disease.”
DUH!!! You can’t do it LESS than is necessary to maintain immunity. And there is no hard and fast line where you are CERTAIN it gives 100% coverage... So clearly you have no choice but to err on the side of “more frequently”.
Dogs are being vaccinated excessively to the point of doing them harm in many instances and this is why people are becoming resistant to the entirely reasonable and beneficial practice of vaccination. If you can’t see the excess on one side of the equation due to being so completely hung up on advocating the other side, then maybe it doesn’t make sense to you, but there actually is a problem.