When infected with a novel coronavirus, patients mainly present with respiratory symptoms, which can be cough or sputum, fever, or difficulty breathing. If the novel coronavirus invades the lung parenchyma and causes alveolar inflammation, it can develop into pneumonia. If the inflammatory lesion of pneumonia is closer to the pleura, it can cause pleurisy and a reaction of the pleura, manifested as chest pain or pleural effusion, and symptoms of chest tightness and shortness of breath can be aggravated. Content source: Dr. You Lai