Table 4.

Fomite-to-finger transfer efficiency of poliovirus 1

Surface type	Avg % transfer efficiency ± SD (range)a
Low (15% to 32%) RHc
Ceramic tile	23.1 ± 24.0 (0.4 to 52.7)
Laminate	36.3 ± 8.7 (24.1 to 50.0)
Granite	33.8 ± 40.4 (0.4 to 100)b
High (40% to 65%) RH
Ceramic tile	29.2 ± 6.4 (19.4 to 35.4)
Laminate	25.5 ± 15.5 (3.4 to 50.0)
Granite	25.9 ± 4.1 (19.7 to 32.1)

^a% transfer efficiency = (PFU finger/PFU control fomite) × 100 (n = 6 for each fomite and microorganism).

^bThe value for the transfer event was >100% and was truncated to 100%.

^cRH, relative humidity.