This is to address generalized immune issues: colds, viral and bacterial infections. I won't go into our long and drawn out medical history but, believe me, when your doctor says to you that there are only two remaining antibiotics left to try - something goes "boom" in your brain! I took extreme issue with our doctor as to medication over prevention practices and, to his credit, he took a big risk and did, finally, step up to the plate. he told us that we were not to tell anyone where we got the information he was about to pass on to us and, to this date, I have not (and I will continue to never divulge his name) but I tell everyone I can about echinacea. we took a. vogel echinacea tincture and have never - N. E. V. E. R. - been sick since. we took the maximum dose everyday until we stopped getting sick - around a year then we took the maintanence dose for about two years afterward. when we realized that we were not getting sick at all anymore we slowly stopped.
I also agree with eating foods that keep the body in an alkalized state. that's all I have to say on the subject except maybe that everybody's system reacts differently to mainstream as well as alternative therapies and some therapies may not have been stuck with long enough to show results.