CRP and COVID-19: Up to 30% of COVID-19 patients with pulmonary symptoms were diagnosed with acute pulmonary embolus on pulmonary CT angiogram over a 1-month period in a tertiary care center and all with higher levels of D-dimer (2660 μg/L) and C-reactive protein (CRP) than usually encountered, suggesting an independent association between D-dimer level and disease severity [46, 65].