Table 2.

Infection risks associated with poliovirus-contaminated lettuce after treatment with various E-beam irradiation doses

E-beam irradiation dose (kGy) (% poliovirus reduction)	Infection riska for each initial poliovirus contamination level (PFU/g)
	1,000	100	10	1
1.46 (83.99)	9.99 × 10−1	8.73 × 10−1	1.86 × 10−1	2.04 × 10−2
2.11 (85.39)	9.99 × 10−1	8.48 × 10−1	1.72 × 10−1	1.87 × 10−2
2.94 (95.19)	9.98 × 10−1	4.62 × 10−1	6.01 × 10−2	6.18 × 10−3
4.03 (98.62)	8.31 × 10−1	1.63 × 10−1	1.76 × 10−2	1.78 × 10−3

^aProbability of infection.