Perhaps ask something like:
Of the beekeepers that you know locally, how many have had the virus, how many have died, how many have remained apparently clear?
Would need to eliminate any duplication where two list members are in the same area.
It seems to me that beekeeping associations should be in an ideal situation to gather reasonably accurate information - good enough to either warrant a more detailed survey, or to disprove the whole thing.
Best wishes
Peter
52°14'44.44"N, 1°50'35"W
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