Well, i grew up in the area and my family ended up being able to have a hunting vizsla which (along with my family) magically survived the banning of anything not communist rule and killing anything noble, whether it is people or their beautiful vizsla dogs...after the 1956 revolution it became even more brutal, sometimes people fleeing and bringing their pregnant vizslas with them having to kill the puppies as their was no way to make them survive safely.
Then as the new area developed their own `noble` level in the society (if u have ever read Orwell u can imagine what i mean) they also picked up hunting. Guess what they figured by the 1970s that they have no bird hunting dogs.... so the pendulum swung to the opposite and it became forbidden to export vizslas and a new phase of importing and breeding started.
Countries like Austria, US, UK, to name a few have helped immensely to save the breed in the dark ages between 50s and mid 70s.
I live now in the US and remain forever thankful to this country to recreate and help save something what i call my most Hungarian side and heritage.