Try it here: http://routemap.osu.edu/
Routemap produces a keyhole markup file (kml) that displays disease transmission events implied by genetic sequence data on pathogens.
Interactive routemap for geographic transmission of viral strains based on 461 full genomes of pandemic Influenza (H1N1). Click the dot for a location of interest. Mouse over the dots that arise from your location of interest to see incoming and outgoing transmissions. On mouse over, the green lines represent outgoing routes for spread of H1N1; red lines represent incoming routes for spread of H1N1.