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The World Health Organization has confirmed that Coronavirus disease2019(Covid19)is a worldwide pandemic. Attention was drawn to the changes that occur in patients’different blood parameters with Covid-19 infection. Therefore, this study is an attempt to assess the pattern of some hematological parameters in some Covid 19 affected persons in the city of Kirkuk in northern Iraq. White blood cells count, lymphocyte count, and neutrophil count were studied in patients with Covid19 as well as red blood cell count and hemoglobin concentration.This is an observational study in 60 laboratory-confirmed patients whose case of Covid 19 was referred to the General Hospital in the town center, from September 1, 2020 to November 30, 2020. Analysis of the data statistics was performed, and the relevant results were presented.Of the 50 patients, 34 were male and 26 were female, ranging in age from 19 to 83 years, with 39 patients over 51 years old. The results showed that there was leukopenia in 44 patients, lymphopenia in 50 patients, and neutropenia in 45 of them.It was concluded that leukocytes, lymphocytes and neutrophils can be used from hematological criteria, which have a prominent role in the diagnosis of Covid19.