Figure 3

Influenza phylogenies estimated using Bayesian and maximum likelihood methods. Branches are coloured according to their rates using a gradient from blue (low rate) to red (high rate). (a) Maximum likelihood inference using a local clock model. (b) Maximum likelihood inference using a discrete clock model. (c) Bayesian inference using a local clock model. (d) Bayesian inference using an uncorrelated lognormal relaxed clock.