title: Sero-epidemiologic studies of meningococcal infection with the direct hemagglutination test.
mesh_terms: D000257:Adenoviridae Infections / Q000276:immunology; D000906:Antibodies / Q000032:analysis*; D000941:Antigens / Q000302:isolation & purification; D002353:Carrier State / Q000175:diagnosis* / Q000276:immunology; D003168:Complement Fixation Tests; D006385:Hemagglutination Inhibition Tests; D006386:Hemagglutination Tests; D006801:Humans; D007251:Influenza, Human / Q000276:immunology; D008589:Meningococcal Infections / Q000175:diagnosis* / Q000276:immunology; D008722:Methods; D008889:Military Personnel; D009305:Nasopharynx / Q000382:microbiology; D009345:Neisseria meningitidis / Q000276:immunology / Q000302:isolation & purification; D011159:Population Surveillance
chemical_list: D000906:Antibodies; D000941:Antigens