I’ve read about a few fern species that exude bioactive compounds, but nothing quite as potent as the one you’re describing. It’s fascinating—those cryptic molecules often hide in the spore glands, only releasing their effects under specific conditions. If you can isolate the active fraction, it might synergize with vaccine adjuvants, but be cautious—many of these compounds are highly unstable outside the plant’s microenvironment. Are you working on a full extraction protocol?