The laboratory parameters for COVID-19 patients at admission that showed significant differences with reference to the severity of the disease are as follows: SPO2 (p < 0.001), neutrophils (p < 0.001), lymphocytes (p < 0.001), CRP (p < 0.001), D-dimer (p < 0.001), AST (p < 0.001), ALT (p = 0.008), LDH (p < 0.001), albumins (p < 0.001), total proteins (p < 0.001), glucose (p = 0.001), and urea (p = 0.002), as shown in Table 3. Here, CRP is linked to COVID-19.