TABLE 1.

Pneumococcal types and groups reacting with the 12 pooled antisera^a

Pool	SGT in pool:					Nonvaccine types or groups
	P	Q	R	S	T
A	1	18	4	5	2
B	19	6	3	8
C	7				20	24, 31, and 40
D			9		11	16, 36, and 37
E			12	10	33	21 and 39
F				17	22	27, 32, and 41
H	14	23		15		13 and 28
G						29, 34, 35, 42, and 47
I						25, 38, 43, 44, 45, 46, and 48

^aNote that G and I are counted separately from the other 12 antisera (see text for details).