Health Team

Study: H1N1 slightly more severe than seasonal flu

Posted September 7, 2010

Last year, many officials reported that the H1N1 pandemic was more severe than the seasonal flu, but a new study puts that claim to the test.

The Centers for Disease Control and Prevention estimate there were up to 89 million H1N1 infections in the U.S. between April 2009 and April 2010.

Marshfield, Wis., which has been the site of flu vaccine effectiveness research for several years, was used to test the severity of the H1N1 virus.

"We realized that we had a unique opportunity to do a comparison between people who had developed the pandemic H1N1 infection versus people that had developed other strains of influenza ‘A’ during earlier seasons,” said Dr. Edward Belongia, with Marshfield Clinic Research Foundation.

The study appears in the Journal of the American Medical Association. Researchers studied influenza "A" patients in 2008, 2009 and during the H1N1 pandemic. They saw very few differences in symptoms and risk of complications in children.

Flu Study finds H1N1 slightly more severe than seasonal

"They had similar risk of being hospitalized and similar risk of developing pneumonia,” Belongia said.

Adults with H1N1 were somewhat more likely to be diagnosed with confirmed pneumonia compared with adults with a seasonal strain of influenza "A.” One researcher in the study caught H1N1.

"Based on everything that we'd been hearing about the pandemic, I was concerned that I would get much sicker, but that never seemed to happen,” said Laura Coleman, an H1N1 patient and researcher.

As in other studies, children and young adults were most susceptible to H1N1. Although the number of severe complications from H1N1 was higher, it may simply be due to a higher number of total infections.

Researchers also reported a higher rate of H1N1 illness in 2009, from October to early November.


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  • freedom monkey Sep 10, 2010

    Beware, the "regular" seasonal vaccines will automatically have the H1N1 vaccine in it. Along with all the other population control chemicals. Just dose up on Vitamin C and stay natural and eat right. That is our problem, our terrible diet as a whole. Eating right will build your immune system to fight any flu.

  • Killian Sep 10, 2010

    I wound up being in confined space with a friend who came down with H1N1 the following day. Aaand, I got it a week after that. It was exactly like he said it was: 1. you go from feeling fine to praying for death within about an hour's time. 2. You are under the covers, passed out for about 4-5 days. 3. You feel like a wet dishrag for another few days after that. 4. You wake up and feel like nothing ever happened.

    It really wasn't that big a deal.

  • freedom monkey Sep 10, 2010

    H1N1 has already been deemed a hoax by the British Medical Association. A tool of EUGENICS. Vaccines carry mercury and sterilizers for population control. Resist. . . SEE LINK SEE LINK

  • EyesintheSkies Sep 9, 2010

    H1N1 equals the hurricane season of 2010 and its 11-16 named storms, 6-8 of them hurricanes and 3-5 of the hurricanes to become major hurricanes with winds of 111 mph or greater. Or not.

  • Hans Sep 8, 2010

    What a joke.

  • Big Mike Sep 8, 2010

    Just wonder what will be the "Epidemic" disease this year? They are probably inventing it in Atlanta right now....soon to be over hyped and release to the public soon...

  • Pseudonym Sep 8, 2010

    Most people knew this all along.

    The CDC and WHO better be careful, or else they're going to turn into the boy who cried "WOLF!!"