Table 1.

Assessment of additional potential SARS-CoV-2 infections using loss of smell/taste and Oxford ELISA readings (n = 9324 samples) and Abbott CMIA readings (n = 11,342). The previously reported sensitivity of the Oxford ELISA is 99.1% (95%CI 97.8–99.7%) and the Abbott CMIA is 92.7% (90.2–94.8%) [8]

	Oxford ELISA reading
	< 4 million Low negative	4.0–7.9 million High negative	≥8 million Positive
Loss of smell/taste reported	326 (4.1%)	59 (13.1%)	426 (47.0%)
Loss of smell/taste not reported	7643 (95.9%)	390 (86.9%)	480 (53.0%)
Total	7969	449	906
Additional estimated number with loss of smell/taste above baseline	–	40 (9.0%)	389 (42.9%)
	Abbott CMIA reading
	< 0.2 Low negative	0.2–1.39 High negative	≥1.4 Positive
Loss of smell/taste reported	358 (3.7%)	106 (15.5%)	518 (47.4%)
Loss of smell/taste not reported	9205 (96.3%)	580 (84.5%)	575 (52.6%)
Total	9563	686	1093
Additional estimated number with loss of smell/taste above baseline	–	81 (11.8%)	478 (43.7%)