Table 1.

OPV-specific antibodies in veterinarians, Friuli Venezia Giulia (Northeastern Italy).

Veterinarians (Years)	n	Positive	Prevalence (%) *
≤30	5	0	0
31–40	13	2	15.4
41–50	10	5	50
>50	8	5	62.5

* p = 0.0078, chi-squared test for trend.