RhinovirusPicornaviridae InfectionsCommon ColdEchinaceaRespiratory MucosaElafinIntercellular Adhesion Molecule-1Respiratory Tract InfectionsCarbocysteineVirus InactivationBronchiNasal MucosaEpithelial CellsAsthmaVirus DiseasesHeLa CellsTracheaAdministration, IntranasalRespiratory SystemInterleukin-8NasopharynxAntiviral AgentsRNA, ViralVirus ReplicationCells, CulturedPulmonary Disease, Chronic ObstructiveCytokinesInflammation MediatorsNF-kappa BRNA, MessengerPicornaviridaeCell Line