More than 10 000 beehives? How does AFB reach 10 000 beehives before the beekeeper takes action? That's the part I don't get. It surely takes time for AFB to s

More than 10 000 beehives? How does AFB reach 10 000 beehives before the beekeeper takes action? That's the part I don't get. It surely takes time for AFB to spread like this. In my country, when AFB is detected, we lockdown (meaning beekeepers cannot move beehives in and out of that radius) and test all the apiaries in a 2km radius. And we destroy the contaminated beehives. But that stays under control. 10 000 beehives sounds like a huge number to me!