Table 3.

Nasopharyngeal swab positivity in relation to IgG positivity.

	Total		Nasopharyngeal swab results
			Negative			Positive low load			Positive			Positive low load + Positive
	N	% of total	N	% of level	% of total	N	% of level	% of total	N	% of level	% of total	N	% of level	% of total
IgG results
Negative (3.8 < IgG < 12AU/mL)	283	35.4	283	100.0	37.2
Positive (≥ 12AU/mL)	516	64.6	477	92.4	62.8	31	6.0	100.0	8	1.6	100.0	39	7.6	100.0
Total	799	100.0	760	95.1	100.0	31	3.9	100.0	8	1.0	100.0	39	4.9	100.0