Figure 2From: Assessing the role of contact tracing in a suspected H7N2 influenza A outbreak in humans in Wales Population variability in number of contacts identified. For each point on the x-axis, the black line shows the number of people (out of the 86 individuals from whom contact tracing was carried out) who identified at least that many contacts. The red, green, and blue lines show the same for home, work, and other contacts respectively.Back to article page