title: [Echo 9 type virus meningitis epidemics in preschool children].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology; D004459:Echovirus 9 / Q000302:isolation & purification; D004457:Echovirus Infections / Q000453:epidemiology*; D006801:Humans; D008587:Meningitis, Viral / Q000453:epidemiology* / Q000382:microbiology; D011044:Poland
vernacular_title: Epidemia zapalenia opon mózgowo-rdzeniowych wywołana przez wirusy Echo typ 9 u dzieci przedszkolnych.