Echinacea.
D003139:Common Cold / Q000188:drug therapy; D020900:Echinacea / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D007107:Immune System / Q000187:drug effects; D007249:Inflammation / Q000188:drug therapy; D008517:Phytotherapy; D010946:Plants, Medicinal