Serological group

IgM

IgG

N

Seropositivity rate (%)

Interpretation

1

+

−

1

0.37

Recent/primary infection

2

+

+

5

1.85

Recent secondary infection

3

−

+

29

10.74

Past Primary infection/ probable secondary infection

4

−

−

235

87.04

No evidence of current/past exposure