title: Study shows echinacea doesn't prevent or ease cold symptoms.
mesh_terms: D003139:Common Cold / Q000517:prevention & control / Q000628:therapy*; D020900:Echinacea; D006801:Humans; D008517:Phytotherapy / Q000379:methods*; D028321:Plant Preparations / Q000627:therapeutic use*
chemical_list: D028321:Plant Preparations