Table 2:

Modeled Prevalence, Sensitivity, Specificity and Positive Predictive Value based on Independent and Conjoined Antibody Testing Results

	Estimate & 95% CrI
Prevalence
Using Abbott only	0.29% (0.01%, 0.78%)
Using ELISA only	0.23% (0.01%, 0.62%)
Using Abbott & ELISA	0.16% (0.02%, 0.46%)
Sensitivity
Abbott assay (independent)	99.61% (97.98%, 99.99%)
ELISA assay (independent)	96.25% (89.36%, 99.51%)
Abbott assay, using both	99.60% (98.00%, 99.99%)
ELISA assay, using both	96.23% (89.45%, 99.52%)
Specificity
Abbott assay (independent)	99.68% (99.37%, 99.88%)
ELISA assay (independent)	99.88% (99.58%, 100%)
Abbott assay, using both	99.61% (99.32%, 99.82%)
ELISA assay, using both	99.83% (99.56%, 99.97%)
Positive Predictive Value
Abbott + (independent)	44.19% (3.25%, 83.06%)
ELISA + (independent)	63.32% (5.46%, 98.64%)
Abbott + & ELISA +	99.11% (95.75%, 99.94%)
Abbott + & ELISA −	1.67% (0.07%, 7.47%)
Abbott − & ELISA +	0.56% (0%, 3.48%)