In the past few years, a few mycologists and entomologist have been researching how a certain type of mushroom mycelium (fungus) may have medicinal properties that help honey bees fight off viruses from the invasive Varroa Mite; which has been devastating honey bee populations world wide. Two scientist in particular, Paul Stamets, a leading mycologist and Dr. Steve Sheppard, the leading Entomologist at the Washington State University are leadings this research. Below is one report of the research findings.
https://www.nature.com/articles/s41598-018-32194-8).