Vaccines aren't required in the US because we don't have myxi and VHD present in our population of wild rabbits. In Australia and the UK wild rabbits have been exposed to and carry these deadly diseases.
If you got a pet because it's cheap you picked the wrong hobby!
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry