Superiority of lymphocyte ratio over total leukocyte count in detecting the severity of COVID- 19 pneumonia

Coronaviruses are positive-sense RNA virus, it has a broad range of
natural host and they can influence on many systems [1]. In humans,
coronavirus can cause many diseases that extend from the common cold
to severe respiratory tract infection, such as, severe acute respiratory
syndrome (SARS), and middle east respiratory syndrome (MERS) [2].
At the end of 2019, an outbreak of acute respiratory infection was
recorded in Wuhan business city of China. At first, the virus is named as
(2019-nCoV) or COVID-19 [3]. Then, this virus is named severe acute
respiratory syndrome coronavirus 2 (SARS-CoV-2) by the International
Committee on Taxonomy of Virus (ICTV) [4].

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