Deadly diseases Friends of the Honey Bee is a campaign to help protect the honey bee particularly from the predations of the Varroa mite. However, there are a number of diseases affecting bees, some more serious than others. They are not infectious to humans but dangerous for the bee. Some of the most serious AFB (American Foul Brood) and EFB (European Foul Brood) are normally treated by destroying the colony (UK). If left they can spread throughout out the whole apiary and affect surrounding beekeepers. Spores from AFB can remain dormant for over 50 years in old beekeeping equipment and cause problems decades later.