In my defense............ there is no foulbrood in the area- at all. Sacbrood/ chaulkbrood probably is everywhere- but bees control it themselves . rarely ever evident. Varroa is widespread- everywhere. I did mention using a bee repellent ( bee- gone) in the supers, keeping them covered as much as possible, and mothballs. The worst robbing of all is that which happens at the time of the death of a colony. Right there is the widespread transmission of disease. That is what I truly fear. That is what none of us can control.