I have been using Echinacea angustifolia as part of an antibiotic protocol for a severe cough. I am still in the process of recovering but Echinacea angustifolia is absolutely indispensible to it; without it, the protocol simply wouldn't work. There are not many places left that sell pure E. angustifolia; nowadays, many sellers blend it with E. purpurea which is almost useless. I was happy to find E. angustifolia at Secrets of the Tribe and I hope you'll continue carrying it.