While it may be true that everyone should vaccinate, it should not be based upon stories like these. If I were to post a story about a herd dying from reaction to a vaccine, would everyone stop vaccinating? I hope not.
For example, a week ago, a guy I know had the vet out to vaccinate his horses and that night his big percheron draft horse was found dead. Maybe coincidence, but if you're against vaccinating, it can be a useful story.
In considering vaccinations, hopefully the vaccine does more good than harm. There is cost:benefit in anything.
What is the incidence of and cost of disease, vs incidence and cost of administering and any reactions?