TABLE 2.

CF response patterns in selected HI response pattern groups

Antibody response by HI	CF response				No. of donor samplesa
	Laboratory 1		Laboratory 2
	A	B	A	B
Positive for A but not Ba	No	No	No	No	8
	No	No	Yes	No	1
	Yes	No	Yes	No	1
	No	Yes	No	Yes	1
	Yes	Yes	No	Yes	1
	No	Yes	No	No	1
Positive for A and Ba	No	No	No	No	8
	No	No	No	Yes	2
	No	No	Yes	Yes	2
	Yes	Yes	Yes	Yes	1
	No	Yes	No	No	2
	No	Yes	Yes	Yes	1

^aThe number of donor samples testing positive for A but not B in HI assays was 13; the number of donor samples testing positive for A and B in HI assays was 16.