The U.S. Centers for Disease Control and Prevention collects data on the number of reported flu cases. The following table shows the number of reported H1N1 flu cases by region for the week ending...

The U.S. Centers for Disease Control and Prevention collects data on the number of reported flu cases. The following table shows the number of reported H1N1 flu cases by region for the week ending December 15, 2013, and the hypothesized proportions from 2009.6