Figure 1.

Proportion of primary outbreak farms from which infection can spread to other farms via movement of (A) any livestock for infectious periods of 1, 2 and 4 weeks; (B) sheep, cattle and pigs for an infectious period of 4 weeks.

Tildesley et al. BMC Veterinary Research 2011 7:76   doi:10.1186/1746-6148-7-76
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