Compared to patients with an alternative diagnosis, those with confirmed or probable COVID-19 had a lower lymphocyte and neutrophil count (median 1.14 × 109/L versus 1.44 × 109/L and 5.8 × 109/L versus 6.4 × 109/L, respectively), but a higher C-reactive protein concentration (52 mg/dL versus 22 mg/dL) at presentation (eTable 1 in the Supplement). The gene discussed is CRP; the disease is COVID-19.