Hello,
In Hungary we do have: Pestoryn Mormyx and Nobivac: both of them for the same type of disases. Nobivac is stronger and only needs 1 shot per year, however it is much more likely to wear down the bunnies for a few days. Pestoryn Mormyx on the other hand is weaker and needs to be repeated every half year.
The other type of shot your bunny would need is for RHD2 virus, here in Hungary we have "ERAVAC" for that. Lasts for 9 months. Based on my experience it wears down the bunny for multiple days and they get limp for a few hours after the shot. (Like their limbs become numb)
There is a combinated as well which is probably called "Nobivac plus" that is an "all in one", however I dont have experience with that.
And on a final note: once you start a vaccination it is recommended to do that moving forward. (So if you started Pestoryn, stick with that for the life of the bunny).
Also, once your bunny receives the shot, it won't mean immunity immediatley. It will take 2 weeks to become immune.
Hope this helps a bit.