The link below will take you to the first blog post of 2022 posted by Steve:

First Blog Post of 2022 - The Walrus

It makes reference to a video "New tools to help honey bees fight varroa mite" from Dr. Kaira Wagoner talking about research into the Unhealthy Brood Odour (UBO) assay. It looks like a very promising way to assess colonies that are likely to manage mites and diseases better than others