Good video by Duck River Honey outlining Dr. Wagoner's UBO test of a sample of Cory Steven's colonies:
https://m.youtube.com/watch?v=CZARsVq9TCo
What is fascinating to me personally is the paradigm that the process of VSH might ultimately prove to be significantly influenced by both hygiene (adult workers uncapping and removing) and brood function (larvae that dispatch significant UBO that is readily detectable).
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