TABLE 2.

Comparison of IgG/IgM/IgA positive rates in three groups of subjects^a

Group	IgG			P	IgM			P	IgA			P
	Positive (n)	Negative (n)	Positive rates (%)		Positive (n)	Negative (n)	Positive rates (%)		Positive (n)	Negative (n)	Positive rates (%)
												<0.001
Patients-acute	258	50	83.77	<0.001	41	267	13.31	<0.001	122	186	39.61	<0.001b,c,d
Patients-recovery	145	3	97.97	<0.001b,c	50	98	33.78	<0.001b,c	131	17	88.51
Postimmune population	528	165	76.19	0.007d	57	636	8.23	0.012d	46	647	6.64

^aP < 0.05 represents a significant difference.

^bPatients-acute, patients-recovery.

^cPatients-recovery, postimmune population.

^dPatients-acute, postimmune population.