Table 3.

Sensitivity of COV2T and COV2G Tests Calculated Against Day of Positive PCR Result and Day of Symptom Onset

	Days After PCR Positivity		Days After Symptom Onset
	COV2T	COV2G	COV2T	COV2G
< 4 d	25.0% (10/40; 12.7–41.2)	17.5% (7/40; 7.3–32.8)	5.9% (1/17; 0.2–28.7)	5.9% (1/17; 0.2–28.7)
4–7 d	39.0% (16/41; 24.2–55.5)	31.7% (13/41; 18.1–48.1)	19.4% (6/31; 7.5–37.5)	12.9% (4/31; 3.63–29.8)
8–10 d	62.1% (18/29; 42.3–79.3)	44.8% (13/29; 26.5–64.3)	57.1% (12/21; 34.0–78.2)	38.1% (8/21; 18.1–61.6)
11–14 d	90.3% (28/31; 74.3–98.0)	64.5% (20/31; 45.4–80.8)	84.4% (27/32; 67.2–94.7)	56.3% (18/32; 37.7–73.6)
> 14 d	100.0% (34/34; 89.7–100.0)	97.1% (33/34; 84.7–100.0)	92.9% (53/56; 85.1–98.9)	91.1% (51/56; 80.4–97.0)

COV2T, SARS-CoV-2 Total antibody assay; COV2G, SARS-CoV-2 IgG antibody assay; PCR, polymerase chain reaction.

Numbers in parentheses are absolute specimen numbers, followed by calculated 95% confidence intervals for sensitivity.