A small number of regions within the US act as bridge regions for the 2009-2010 H1N1-flu season. Within every state, we quantify the extent to which the individual spatial patterns are dominant using a pie-chart representation. The colors represent respective spatial patterns (W1...5), as highlighted in the legend. In the pie-chart, a line in the middle points out the 50% cut-off for a particular flu pattern and is used as a guide to identify dominant patterns. For the individual HHS regions shown below, we can see a dominant pattern, within the individual states, (for e.g., MA, CT, MT, CO, MS) more than one pattern dominates indicating the complexity of how the H1N1 flu spread within these regions. Note that the patterns also correspond to the time when the flu peaked in these individual regions and hence such patterns are instructive in visually interpreting how the different spread patterns affected an individual state.