All patients had elevated CRP levels (above 4 mg/L) but those above 100 mg/L had increased odds of COVID-19 (OR: 2.78, 95% CI: 1.87-4.12, p<0.001). There was a difference in platelet count between cohorts but with no observed effect on the odds of having COVID-19 compared to influenza (OR: 1.00, 95% CI: 1.00-1.00, p=0.024) (Table 2). Here, CRP is linked to influenza.