TABLE 5.

Specificities of HIV screening assays

Assay	No. of false-positive samples		Specificity (%)
	Initially reactive	Repeatedly reactive	Initially reactive	Repeatedly reactive
VIDAS HIV DUO Ultra	6	5	97.7	98.1
Genscreen Plus HIV Ag-Ab	17	0	93.4	100
Enzygnost HIV Integral	4	2	98.4	99.2
Enzymun-Test HIV Combi	4	2	98.4	99.2
Genscreen HIV 1/2, version 2	7	2	97.3	99.2
Genetic Systems HIV-1 Ag	16	8	93.7	96.9