Table 4.

Nasal secretions range, median, and dilution values of anti-SARS-CoV-2 IgA-S1 and anti-SARS-CoV-2 IgG-RBD antibody levels in the three study groups.

NASAL SECRETIONS
	Population	Median	Range	Dilution
IgG-RBD	Healthy	0.63 BAU/ml	0.48–0.99 BAU/ml	No dilution
	Vaccinated	1.91 BAU/ml	0.65–32.97 BAU/ml	No dilution
	COVID-19	0.79 BAU/ml	0.57–7.59 BAU/ml	No dilution
IgA-S1	Healthy	0.86 COI	0.32–2.92 COI	1:2
	Vaccinated	7.56 COI	1.40–61.10 COI	1:2
	COVID-19	6.44 COI	1.44–90.00 COI	1:2