TABLE 1.

Distribution of OD value in sera from healthy blood donors

A450 range	No. of serum samples	% of sera	Cumulative %
0-0.01	0	0.00	0.00
≥0.01-0.02	0	0.00	0.00
≥0.02-0.03	2	0.16	0.16
≥0.03-0.04	39	3.07	3.22
≥0.04-0.05	149	11.71	14.94
≥0.05-0.06	148	11.64	26.57
≥0.06-0.07	120	9.43	36.01
≥0.07-0.08	120	9.43	45.44
≥0.08-0.09	188	14.78	60.22
≥0.09-0.1	182	14.31	74.53
≥0.1-0.11	135	10.61	85.14
≥0.11-0.12	63	4.95	90.09
≥0.12-0.13	48	3.77	93.87
≥0.13-0.14	30	2.36	96.23
≥0.14-0.15	13	1.02	97.25
≥0.15-0.16	16	1.26	98.51
≥0.16-0.17	7	0.55	99.06
≥0.17-0.18	5	0.39	99.45
≥0.18-0.19	1	0.08	99.53
≥0.19-0.2	2	0.16	99.69
≥0.2-0.28	4	0.31	100.00