Laboratory tests known to correlate with inflammation were more severe among COVID-19 patients compared to influenza patients, specifically, maximal C-reactive protein (CRP) levels (median 13.41 (IQR (6.22–24.94) vs.7.05 (3.3–15.4), p < 0.001), maximal ferritin level (743.35 (330.7–1600.5) vs. 190.20 (61.2–351.4), p < 0.001) and minimal albumin levels (3.00 (2.5- 3.5) vs. 3.5 (3.10- 4.00) p < 0.001). Here, CRP is linked to COVID-19.