Table 1.

Desiccant study.

	Appropriate air dry Index mean (CV)	Bag with desiccant Index mean (CV)	Bag with no desiccant Index mean (CV)
Level 1	1.05 (15%)	1.09 (13%)	1.02 (5%)
Level 2	8.09 (8%)	6.69 (14%)	6.17 (18%)

Whole blood from a SARS-CoV-2 IgG borderline positive (Level 1) and an unequivocally positive donor (Level 2) were spotted onto filter paper and dried using different protocols listed (see text). All resulting DBS were analyzed (5 replicates each) within the same batch.

CV = coefficient of variation.