Where does Varroa mites comes from?
The Varroa is a natural parasite living on the East Indian bee Aspis cerana for millions of years.
Scientists found the Varroa first time in 1904.
The honeybee Apis mellifera never had any contact with this parasite before.
In 1975 Scientists form a German University and Beekeeping Institute ordered queens form the east for tests and crossbreeding. This idiots didn¬ít inspect the new queens and bees and so arrived the Varroa mite in Europe. In 1977 we found the first Varroa mites in colonies close to this institute.
If thinks like this will be happen with a private person, they would bring him in jail till the end of his live.
The rest was easy¬Ö When I see all the beekeeper on this forum asking for nucs and queens instead breeding there own. It is not better in the rest of the world.
Transporting bees from one continent to other will also bring the disease with. Same thing with the small hive beetle from Africa to the US.