title: California group virus infections in Illinois.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004671:Encephalitis, Arbovirus / Q000453:epidemiology; D004670:Encephalitis, California / Q000150:complications / Q000175:diagnosis / Q000453:epidemiology / Q000517:prevention & control / Q000635:transmission; D005260:Female; D006801:Humans; D007087:Illinois; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D012621:Seasons