USA Today: Obesity a swine flu risk factor?

Some swine flu cases in America are raising questions about obesity's role in why some people with infections become seriously ill.

A high proportion of those who have gotten severely ill from swine flu have been obese or extremely obese, but health officials have said that might be due to the fact that heavy people tend to have asthma and other conditions that make them more susceptible. Obesity alone has never been seen as a risk factor for seasonal flu.

But in a report released Friday, health officials detailed the cases of 10 Michigan patients who were very sick from swine flu in late May and early June and ended up at a specialized hospital in Ann Arbor. Three of them died.

Nine of the 10 were either obese or extremely obese. Only three of the 10 had other health problems. Two of the three that died had no other health conditions.

This hardly settles the question of whether obesity is its own risk factor for swine flu. It's possible the patients had undiagnosed heart problems or other unidentified conditions.

Still the finding was striking, investigators acknowledged.

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USA Today: Obesity a swine flu risk factor?