How can I prevent fire blight from infecting new apple trees when old trees in the area have been affected?

Question: I have an old farm with 200-year-old apple trees and some have been infected with fire blight. I am planting some new apple trees and want to know how to plant them so the fire blight doesn’t infect the new ones. Is there a distance recommendation or specifics about how the disease is spread read more How can I prevent fire blight from infecting new apple trees when old trees in the area have been affected?