Table 3. Prevalence of IgM antibodies in relation to symptomatology among the participants.

Status of symptoms	IgM positive (%)	IgM negative (%)	Exact significance (two-sided)
Symptoms present	1 (7.1%)	17 (16%)	0.691
Symptoms absent	13 (92.9%)	89 (84%)
Total	14 (100%)	106 (100%)