Myoxmatosis will have been introduced into an area where the rabbit population has exploded, its common practice for infected rabbits to be released near warrens to help reduce the population. The virus being spread by fleas
Rabbits seem to have built up a resistance to the virus and it's not as deadly to them as it once was, I used to be a pest controller and I've lost count of the many rabbits I've dispatched over the years, if I saw a badly infected rabbit I would dispatch it, a not so one I would leave to help spread the virus.
I know it’s a horrible death for the animals, but its one of the most effective ways of culling the rabbit population. People think of the animals as cute, but you ask a farmer how much damage they cause each year and you'll be surprised. It is estimated that rabbit damage alone in the uk runs to something like £100.000.000 annually.
Norm