title: Virulence of respiratory viruses.
mesh_terms: D006801:Humans; D007109:Immunity; D012137:Respiratory System / Q000382:microbiology; D012141:Respiratory Tract Infections; D012229:Rhinovirus / Q000472:pathogenicity; D014774:Virulence; D014780:Viruses / Q000472:pathogenicity*