The Clinical Laboratory: A Key Player in Diagnosis and Management of COVID-19.

The Coronavirus disease 2019 (COVID-19) outbreak, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), had emerged as a pandemic affecting almost all countries in the world in a short span after it was first reported in December. Clinical laboratory have a crucial role in mitigating this new pandemic. Timely and accurate diagnosis of COVID-19 is of paramount importance for detecting cases early and to prevent transmission. Clinical Laboratories have adopted different test modalities and processes to tackle this unprecedented situation with directives from regulatory bodies such as the WHO. The varying presentations, as well as complications attributed to comorbidities in COVID-19, have created hurdles in the management of these patients. Various clinical laboratory parameters have been investigated for their potential for diagnosis and prognosis of the disease, prediction of complications and monitoring of treatment response. Different routine and uncommon parameters have been shown to have the diagnostic and prognostic capacity. This update discusses the role of the laboratory in diagnosis, prognosis and monitoring of treatment response. Different methodologies for diagnostic testing as well as various clinical laboratory parameters having diagnostic and predictive powers have been discussed. This compilation organises relevant available information on various clinical laboratory parameters and their role in COVID-19 mitigating pandemic.