[Epidemiological analysis of epidemic meningitis in Xuchang district for 27 years and preliminary observations on the forecast of epidemics].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D002681:China; D005544:Forecasting; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008585:Meningitis, Meningococcal / Q000453:epidemiology*; D012621:Seasons; D013997:Time Factors