Table 2.

ELISA titers of samples from two typical patients with type I response^a

Patient	No. of days after onset of fever	Titer
		r47b		r56s
		IgM	IgG	IgM	IgG
MAK 135	3	−	−	100
	10	−	100	1,600	3,200
	17	100	400	3,200	6,400
	24	200	1,600	6,400	12,800
	31	−	1,600	1,600	6,400
	69	−	800	400	3,200
	94	−	800	100	3,200
MAK 229	5	100	−	400	100
	17	200	400	6,400	3,200
	26	100	800	3,200	1,600
	49	100	400	1,600	1,600
	69	100	400	800	1,600

^a−, ELISA negative (titer less than 100).