nope....it means exactly what he described above - if people around me are sick and I know there is little or no chance of escaping it I'll take one a day for a few days...and I don't get sick. Or say I feel that first hint of "hmmm" could I be getting sick, but you're not sure, well same thing, take it for a few days and that first hint of a symptom doesn't ever amount to much or never was anything...eitherway I'm happy. If I am already sick, I take it and gives me the energy as if I'm not sick while the sickness is still running its course.