From the Centers for Disease Control:
According to this week's FluView report, flu activity continues to increase across the nation. High levels of activity are still being reported in the South Central and Southeastern states, and other parts of the country are now experiencing increases in flu activity as well. Additional increases across the United States are expected in the coming weeks. Anyone 6 months and older who has not gotten a flu vaccine yet this season should get one now. Below is a summary of the key indicators for the week of December 15-21, 2013: Alabama, Louisiana, Mississippi, Missouri, Oklahoma, and Texas experienced high ILI activity; an increase from four states in the previous week. Eight states (Colorado, Indiana, Kansas, North Carolina, Pennsylvania, South Carolina, Tennessee, and Utah) experienced moderate ILI activity. Six states experienced low ILI activity. Twenty-eight states experienced minimal ILI activity. The District of Columbia, New York City, Arkansas, and Kentucky did not have sufficient data to calculate an activity level. ILI activity data indicate the amount of flu-like illness that is occurring in each state.