So you're saying you have a sycrometer and slides? That you can personally measure their frequencies? And you really don't think a weaken pathogen could and would be dealt with by the immune system?
That's the biggest difference in between a jar of water or a slide of a living parasite zapped to just short of bursting.
If they can survive and regain their full range of frequencies, why didn't Dr. Clark's experimental creatures ever do so? She kept them till they died, and they never recovered. She was quite worried about that it could be made a weapon, as lethal as it ended up being for her creatures. I don't see that she was forced to fear monger this either.