title: [Rheumatic fever: incidence and morbidity among school children attending elementary school  2 at Aleksandrów].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D006801:Humans; D011044:Poland; D012140:Respiratory Tract Diseases / Q000453:epidemiology; D012213:Rheumatic Fever / Q000453:epidemiology*; D012541:Scarlet Fever / Q000453:epidemiology
vernacular_title: Goraczka reumatyczna zachorowalność i chorobowosć wśród dzieci szkoły podstawowej nr 2 w Aleksandrowie.