There is a lot of research on this. Varroa treatments have eliminated the selection pressure but there are wild bees that have adapted. More propolis is one ada

There is a lot of research on this. Varroa treatments have eliminated the selection pressure but there are wild bees that have adapted. More propolis is one adaptation but there are also other genetic traits that help control it (e.g., brood recapping behavior) and other beekeeping practices that help the varroa (e.g., keeping hives next to each other). Trying to focus on a single thing as the miracle cure for varroa doesn't work. Most of this has been known for a while now: https://m.youtube.com/watch?v=T7CB8E7jKBc https://m.youtube.com/watch?v=T7CB8E7jKBc