Bees have the genetic resources to overcome disease, but mites and diseases are being unintentionally selectively bred by the chemical ag industry through the application of 'cides.  

As with human disease organisms, like antibiotic resistant bacteria, where the misuse of antibiotics accelerates the evolution of the bacteria beyond the capacity of the immune system to adjust.  The shorter life cycle of mites and disease organisms gives them an advantage over the host organism, the bees.  

Could bee breeders help bees overcome this aspect of the problem?  They are fighting the basic laws of natural selection.  As are the the developers of new human antibiotics.

Eliminate chemical agriculture, that is the way to fight this trend in the whole food system.  Animals fed antibiotics are transferring resistant disease organisms to humans.  Our food system has become the perfect breeding ground for accelerated evolution of disease organisms hosted by insects, animals, and humans.

Bees are the high profile canaries in the coal mine, because of the huge effect of pollination rates on agricultural productivity.  Restore wilderness conservation land to the natural state, like a Prarie National Park would, and farmland to organic agriculture, and the system will be healthier.  

And humans will be healthier and happier and spend far less financial energy on antibiotic after anitibiotic and treatment after treatment, always behind the eight ball in the vital sphere of natural selection.  Humans think they can beat mother nature, but she has the last word, we are all mortal.

And that's the very last word.