In bivariate analysis male gender (p-value 0.02), age older than 50 years (p-value 0.02), hypertension (p-value 0.005), DM (p-value 0.008), presence of fever (p-value 0.006), arterial O2 saturation < 93% (p-value 0.001), respiratory rate of ≥ 25 breaths/min (p-value 0.08), erythrocyte sedimentation rate (ESR) > 60 mm/h (p-value 0.05), and C-reactive protein (CRP) ≥ 91 mg/L (p-value 0.09) were significantly associated with prolonged recovery time. The gene discussed is CRP; the disease is hypertensive disorder.