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. 2020 Aug 14;40:101–102. doi: 10.1016/j.clnesp.2020.08.004

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© 2020 European Society for Clinical Nutrition and Metabolism. Published by Elsevier Ltd. All rights reserved.

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 1 — Neutrophil-lymphocytes ratio during the COVID-19 pandemic. High neutrophil-lymphocytes ratio (NLR ) leads to severe complications in the COVID-19-infected patients, such as fatigue, dry cough, fever, pneumonia, acute respiratory infection, failure organs and poor quality of life. On the other hand, maintenance of blood NLR concentrations may to ameliorate the impairment immune system response. Therefore, NLR is useful marker in clinical routine to screening the prognosis in the COVID-19-infected patients.