<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#ff0000;color:#202122;text-align:center;"> </div> &gt;1500 cases</div>
<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#ff6600;color:#202122;text-align:center;"> </div> 1001–1500 cases</div>
<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#ff9400;color:#202122;text-align:center;"> </div> 501–1001 cases</div>
<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#fec500;color:#202122;text-align:center;"> </div> 101–500 cases</div>
<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#ffff00;color:#202122;text-align:center;"> </div> 51–100 cases</div>
<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#8cc700;color:#202122;text-align:center;"> </div> 11–50 cases</div>
<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#0fad00;color:#202122;text-align:center;"> </div> 1–10 cases</div>
<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#999999;color:#202122;text-align:center;"> </div> 0 cases</div>
Influenza A (H1N1) numbers for confirmed cases by state as reported to the CDC for May 11, 2009 from: <a rel="nofollow" class="external text" href="https://www.webcitation.org/5ghgpiW5L">Novel H1N1 Flu Situation Update May 11, 2009, 11:00 AM ET</a>. <a href="//commons.wikimedia.org/w/index.php?title=Centers_for_Disease_Control_and_Prevention&amp;action=edit&amp;redlink=1" class="new" title="Centers for Disease Control and Prevention (page does not exist)">Centers for Disease Control and Prevention</a> (<span class="mw-formatted-date" title="2009-05-11">2009-05-11</span>). Archived from <a rel="nofollow" class="external text" href="https://www.cdc.gov/h1n1flu/update.htm">the original</a> on <span class="mw-formatted-date" title="2009-05-11">2009-05-11</span>. Retrieved on <span class="mw-formatted-date" title="2009-06-03">2009-06-03</span>.
<a href="//commons.wikimedia.org/wiki/User:Falcorian" title="User:Falcorian">Falcorian</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>, using <a href="//commons.wikimedia.org/wiki/File:Blank_USA,_w_territories.svg" title="File:Blank USA, w territories.svg">this blank map</a> as a template, with map key from <a href="//commons.wikimedia.org/wiki/File:Statehood_quarters_map_2009.svg" title="File:Statehood quarters map 2009.svg">this map</a>.