I have been taking Echinacea for over 11 years now. I've severe alergies to dust, polan and to cats. since one of my past co-worker introduced me to this herb, it really helps me a lot when I am suffering with my alergies. I only take this herb as needed.
would start with a head cold, then it would move down to a sore throat and then down again into a chest cold. I have taken this herb for 2 years straight and once in awhile I have a low grade fever but that is it.