The respiratory tract and its infections.
D001991:Bronchitis / Q000517:prevention & control / Q000628:therapy / Q000821:virology; D003139:Common Cold / Q000517:prevention & control / Q000628:therapy / Q000821:virology; D006235:Hand Disinfection; D006801:Humans; D010612:Pharyngitis / Q000517:prevention & control / Q000628:therapy / Q000821:virology; D011014:Pneumonia / Q000188:drug therapy / Q000382:microbiology / Q000517:prevention & control; D012141:Respiratory Tract Infections / Q000517:prevention & control* / Q000628:therapy / Q000821:virology; D012852:Sinusitis / Q000517:prevention & control / Q000628:therapy / Q000821:virology