"Conversely, it would be adaptive for any locally-adapted stock of bees to
develop resistance to both mites and local pathogens (including viruses)."
In humans there are antibodies that are developed *after* initially succumbing to an illness that allow us to be "resistant" the next time we are exposed. I cannot see that bees could have such a mechanism as their lives are too short. So what mechanism do you imagine they could be bred for that would allow them to resist viruses?
Christina
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