CRP and Pleural effusion: Certain comorbidities (cardiovascular disease, diabetes, obesity), biomarkers (elevated interleukin-6, C-reactive protein (CRP), D-dimers), and radiological findings (pleural effusions, large extent of parenchymal lesions) have been reported to be associated with a severe course or death due to COVID-19 [10,11,12,13,14,15].