title: Two families under the epidemiological microscope.
mesh_terms: D004812:Epidemiologic Methods; D005243:Feces / Q000382:microbiology; D005767:Gastrointestinal Diseases / Q000382:microbiology; D006801:Humans; D012141:Respiratory Tract Infections / Q000235:genetics*; D018108:Respirovirus / Q000302:isolation & purification; D012229:Rhinovirus / Q000302:isolation & purification; D006113:United Kingdom; D014481:United States; D014777:Virus Diseases / Q000235:genetics*