ABSTRACT
Influenza A [H1N1] imposed a considerable burden on our health community. This study was conducted to evaluate the clinical and paraclinical pattern of the disease in influenza A [H1N1] patients in Kashan. This descriptive study was carried out on 87 definite cases of pandemic influenza A [H1N1] diagnosed from July to January 2009 in Kashan. The clinical and paraclinical information were collected and analyzed by SPSS-13. The majority of patients were in age group 16-25 years and 50.6% of patients were male. The most common clinical symptoms were fever [92%], cough [78.2%] and dyspnea [54%]. The most important paraclinical findings were: leokocytosis [41.3%] increased ESR [46.6%], positive CRP [48.7%]. The mortality was seen in 8 patients [9.2%]. Regarding to majority of death has occurred in patients with underlying disease, annual prophylaxis by influenza vaccine and early treatment to prevent of morbidity and mortality is recommended