Spread of meningococcal infection within households.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001938:Brazil; D002353:Carrier State; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007122:Immunoelectrophoresis; D007223:Infant; D008589:Meningococcal Infections / Q000134:cerebrospinal fluid / Q000453:epidemiology / Q000235:genetics* / Q000382:microbiology; D008875:Middle Aged; D009345:Neisseria meningitidis / Q000302:isolation & purification; D012112:Residential Facilities