You're getting downvoted because it's annoying to spout your own success, and EXTREMELY suspect that it's replicable. It's basically spam.
A message reminding people that you can improve the resistance to basic colds/flu for a school teacher, tested on several school teachers, should be motivating for someone tired of being sick.
You asked why you're getting downvoted. I'm doing you the service of explaining it's because your comment looks spammy and annoying. Take the feedback...