Ramaswami: The graph shows the progress of the disease once the number of infected people crosses the 100 mark. Since the epidemic has traveled to these countries at different times, the trajectories of the number of infected differ, but it seems to follow the same pattern once you adjust the graph to show the days adjusted to when Italy reached 100 infections. It is clear that all countries tend to double the number of infected between 3 to 5 days. As the graph shows, India is about three weeks behind the US and 20 days behind Italy.