*Perspective Chapter: COVID-19 behind Ground Glasses DOI: http://dx.doi.org/10.5772/intechopen.107024*

the preanalytical stage, obtaining the appropriate respiratory tract sample at the right anatomical site at the right time is essential for the molecular diagnosis of COVID-19. At the analytical stage, real-time reverse transcription PCR (RT-PCR) tests are the preferred molecular test method for the etiological diagnosis of SARS-CoV-2 infection [7]. Pneumonia is a common serious symptom of infection, characterized mainly by fever, cough, dyspnea, and bilateral infiltrates on lung imaging. Methods such as chest radiography, chest computed tomography, and pulmonary ultrasonography are used for imaging the lungs.
