This herb , Yerba santa is not a herb you hear about a lot. It is known at Bear Weed or Mountain Balm. I have not used it in my office practice. I do recall my mentor in Ithaca pointing it out on a herbal walk many years ago. It has been used in traditional Native American remedies
By some it is considered a Holy plant.
When I think of cold and flu I think of Elderberry, Elecampane, and Lungwort. I often add Horehound and use that.
It also bene used for pain relief. I will try to source this herb and start to use it more and more as I read a lot of about it from a variety of books