Table 2.

Relationship between blood infection and blood group.

Blood group	Infection present	Infection absent	Total	% infected
A-	7	21	28	25
A+	31	245	276	11.2
B-	1	19	20	5
B+	33	266	299	11
AB-	0	6	6	0
AB+	2	41	43	4.7
0-	9	34	43	20.9
0+	74	568	642	11,5