CRP and COVID-19: Similarly, except for PCT (r = 0.112, p = 0.147) and LDH (r = 0.116, p = 0.130), the positive association of WBC (r = 0.281, p = 0.000), CRP (r = 0.442, p = 0.000) and ferritin (r = 0.181, p = 0.018) with COVID-19 severity remained significant after adjusting for age albeit week.