In our country, fatal cases of H1N1 pneumonia were detected between 2015-2016 years. Our aim is to analyze the mortality and severity related factors, during admission of these patients. By conducting a retrospective analysis, 17 cases, confirmed to have H1N1 pneumonia, included in the study. Findings were compared in terms of ARDS and mortality. ICU and hospital mortality rates were 50% and 30%. The mean age of patients was 50 years. Serum LDH, CK, CK-MB, CRP AST, ALT levels, and the neutrophil-to-lymphocyte ratio (NLR) were found to be increased. In terms of coinfections, there wasn't a significant difference between died and survived patients. The mortality rate was 50% in patients with ARDS. There was no relationship between hospital stay with mortality. The symptom of restlessness was related to mortality, and presence of ARDS (P
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