>A change of environment would certainly include the plant community, but presumably much more. A change of location has long been recommended as a treatment for any number of disorders (of humans).
EFB is said to be a stress disease. Ease the stress and it goes away. I can attest to this in that I used to have hives at one spot and they would get a dose of EFB as the plants there only yielded nectar and no pollen. Shift them away to a better pollen source and the EFB symptoms disappeared.
Trevor Weatherhead
Australia
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