## Figure 2.
The ratio of intra to inter-group infection rates for different sources of infection
where disease persisted. The graph shows badger-derived infection (scenario 1; solid bars) compared with badger-derived
and externally-derived infection (scenario 2; dotted bars). For scenario 2, the low
density-dotted bars represent an externally-derived transmission probability of 0.0001,
the medium density-dotted bars represent a probability of 0.001 and the high density-dotted
bars represent a probability of 0.01. 95% confidence intervals are also shown. For
a group size of 4, infection did not persist unless the probability of externally-derived
infection was at least 0.001.
Hardstaff |