title: Persistence of viral antibodies in patients with chronic bronchitis.
mesh_terms: D000256:Adenoviridae; D000328:Adult; D000906:Antibodies; D001991:Bronchitis / Q000150:complications / Q000382:microbiology*; D003168:Complement Fixation Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D009975:Orthomyxoviridae; D010222:Parainfluenza Virus 1, Human; D012136:Respiratory Syncytial Viruses; D018108:Respirovirus; D014777:Virus Diseases / Q000150:complications
chemical_list: D000906:Antibodies