They're not exactly sure how they work, but they do know they supercharge your immune response and get you to where you want to be even without being vaccinated. All the research is animal model stage, means mice, very expensive engineered mice, but it's very active and they will be pushing for human experimentation, even if only in vitro, quite shortly, because the results are so promising. Progress is slow going because the research is so fundamental.
Now watch some simpleton declare the Harvard Gazette a "pump and dump" publication.