Case numbers increased significantly from yesterday, an additional 946. CDC reports 4,298 cases of swine flu, H1N1, in the United States. Only four states have no reported cases, Alaska, Mississippi, West Virginia and Wyoming.

The curious mix of case locations continues. The twelve states in the Midwest have 35% of the total U.S. cases (1,522) while the four states that border Mexico have 32% (1,394). Those numbers are not reflective of a region-wide outbreak, since New Mexico reports 51 cases while the other three border states have over 400 each. In the Midwest, the cases are primarily limited to Illinois-620, Wisconsin-510 and Michigan-141. The other states in the Midwest have only 251 cases between them.

Five states have reported 57% of the swine flu, H1N1 cases, Illinois, Wisconsin, California, Texas and Arizona.

Swine flu / H1N1 case counts continue to climb in the United States and in Canada. The U.S. military continues to add cases at a rate of just over 20 per day. The CDC count for today is 3,352 cases.

Six states continue to be free of swine flu cases, Alaska, Arkansas, Mississippi, North Dakota, West Virginia and Wyoming.

Click on the image for a larger view of this CDC map.

SAMPLE COUNTS
Midwest states (1,292) 39% of total: Illinois-592, Wisconsin-496, Michigan-134, Indiana-70

Mexican border states (745) 22% of total: Texas-293, California-221, Arizona-187, New Mexico-44

CANADA

As of May 13 2009, a total of 389 laboratory-confirmed cases of H1N1 Flu Virus (Human Swine Flu) have been reported in 9 provinces and 1 territory in Canada. [snip]

As of May 11, 2009, half the cases are 22 years of age or younger (median: 22 years; range: 1 – 66 years). To date, 11 cases have been hospitalized and one death has been reported. The most recent date of onset of illness is May 8, 2009.

DEPARTMENT OF DEFENSE

DoD swine flu clusters for May 13, 2009. USS Dubuque increased 5 cases, and BUDs by 1.

The United States military is tracking swine flu / H1N1 cases diagnosed and/or treated at its medical facilities. So far as I know, these numbers are included in those reported by the state health departments to the CDC.

Swine flu / H1N1 cases tracked by the U.S. military as of May 12 2009.

Current U.S. military swine flu / H1N1 clusters and concerns as of May 12 2009.

CDC (modified by state counts as noted)

Canadian Public Health Agency

As of 1 pm EDT, the CDC has 2,600 cases in 43 states and the District of Columbia. Alaska, Arkansas, Mississippi, Montana, North Dakota, West Virginia and Wyoming have no confirmed cases.

Here are those states with case numbers over 100:

Here are all the U.S. states with swine flu cases exceeding 100.

Many states update their websites after the CDC does its update. Wisconsin is showing 30 additional cases. California is showing 1 additional case but the probables far exceed the confirmed, at 202.

New York is six higher, at 196. 158 of those are in New York City.

Arizona has 4 more cases. 124 of the 186 cases are under the age of 18.

The Department of Defense shows 147 cases, 82 of which are active duty. 30 of this number are shown as “ship”, presumably the USS Dubuque. The BUDs class for SEALS also has cases. I believe the DoD cases are included in the CDC numbers.