[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.

[FrogInABlender]

Here's a link to an old FR thread about the possibility that vaccinations actually provide protection for much longer than 1 year and that vaccinataing every year might be causing problems. It made me think twice about my vaccination schedules.

http://www.freerepublic.com/focus/news/670518/posts

[Beaker]

Riding in an hour. Here's hoping that I don't get eaten by my instructor t'day, but the chances aren't good that I won't.