[HairOfTheDog]

Interesting, like I said. I have never questioned vaccinations because for me they have been zero consequence..... but I also never hear of horses 'catching' any of the diseases we are vaccinating for, with the exception of strangles. So I have to wonder if we are applying vaccines across the whole nation for illnesses that are not even found in some places.

[Beaker]

..... but I also never hear of horses 'catching' any of the diseases we are vaccinating for, with the exception of strangles
It is also possible that mutated strains of the virus will occur over time. We could be seeing a bit of that too.