title: Virus antibody levels in rheumatoid arthritis and systemic lupus erythematosus.
mesh_terms: D000906:Antibodies; D000956:Antigens, Viral; D001172:Arthritis, Rheumatoid / Q000209:etiology / Q000276:immunology*; D003168:Complement Fixation Tests; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000209:etiology / Q000276:immunology*; D008459:Measles virus / Q000472:pathogenicity; D018108:Respirovirus / Q000472:pathogenicity; D012412:Rubella virus / Q000472:pathogenicity
chemical_list: D000906:Antibodies; D000956:Antigens, Viral