Table 1.

Overview of the positive or borderline serological results.

Serological group	Median	Max	SEM	Skewness
IgG
Borderline	130	200	0.9	0.4
Positive	600	3,215	7.3	1.1
IgM
Borderline	140	200	1.4	0.1
Positive	595	1,880	7.6	0.6