Figure 6.29 Iceland: internal epidemic pathways. Observed transmission routes between Icelandic settlements for measles, rubella and pertussis, 1900–90. Vectors show the number of times the diseases were recorded in Heilbrigðisskýrslur (Public Health in Iceland) as passing between linked medical districts.

Source: Reproduced from Cliff et al, Island Epidemics, Figure 6.4, p. 247, Oxford University Press, Oxford, UK, Copyright © 2000 by permission of Oxford University Press.