Table 1.

Baseline characteristics of study participants.

Characteristics		N (%)
Sex
	Female	35 (57)
	Male	26 (43)
Age (years)
	20–29	13 (21)
	30–39	33 (54)
	40–49	11 (18)
	50–59	4 (7)
Doses of primary trivalent oral polio vaccine (tOPV) in childhood
	0	1 (2)
	1	2 (3)
	2	37 (61)
	unknown	21 (34)

N = 61, number of participants completed study protocol.