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H1N1 Cases Overestimated...most flu cases aren't even flu


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You've got to see the results of this CBS investigation.

 

They found that most assumed flu cases weren't even the flu, let alone H1N1. At most, 17% of those tested for the flu, had H1N1.

 

http://www.cbsnews.com/video/watch/?id=5405872n&tag=api

 

Yep...and then today, I read that the CDC estimates that 1 in 5 kids have had H1N1 already and that of the 5000 samples sent in, most WERE H1N1. I wish they would make up their minds already! I am all for being scared sh*tless over something if it is warranted, but heck, I am starting to wonder what is true and what isn't anymore!

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Yep...and then today, I read that the CDC estimates that 1 in 5 kids have had H1N1 already and that of the 5000 samples sent in, most WERE H1N1. I wish they would make up their minds already! I am all for being scared sh*tless over something if it is warranted, but heck, I am starting to wonder what is true and what isn't anymore!

 

I didn't see this yet. Do you have a link? I would love to read the whole thing.

Thanks

Melissa

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Yep...and then today, I read that the CDC estimates that 1 in 5 kids have had H1N1 already and that of the 5000 samples sent in, most WERE H1N1. I wish they would make up their minds already! I am all for being scared sh*tless over something if it is warranted, but heck, I am starting to wonder what is true and what isn't anymore!

 

 

And this is exactly why I'm not in a panic. We aren't staying home, but you won't find me at an indoor play place of any kind right now. There's no way to have control over the situation and I refuse to be put into a panic by the media and/or the government.

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And this is exactly why I'm not in a panic. We aren't staying home, but you won't find me at an indoor play place of any kind right now. There's no way to have control over the situation and I refuse to be put into a panic by the media and/or the government.

 

 

We avoid indoor play places this time of the year anyway, simply because we discovered that we could guarantee that our kids would be sick two days later EVERY time.

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I didn't see this yet. Do you have a link? I would love to read the whole thing.

Thanks

Melissa

 

I have read it several places, but the first one I could find just off the bat was this one http://cdc.gov/h1n1flu/update.htm

 

Almost all of the influenza viruses identified so far are 2009 H1N1 influenza A viruses. These viruses remain similar to the virus chosen for the 2009 H1N1 vaccine, and remain susceptible to the antiviral drugs oseltamivir and zanamivir with rare exception.

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I found this interesting as well. It is from a meeting held but the WHO on the severe cases and treatment. It gives a bit of a different demographic than the CDC is giving as far as risk groups go: http://www.who.int/csr/disease/swineflu/notes/h1n1_clinical_features_20091016/en/index.html

 

Groups at greatest risk

 

Participants agreed that the risk of severe or fatal illness is highest in three groups: pregnant women, especially during the third trimester of pregnancy, children younger than 2 years of age, and people with chronic lung disease, including asthma. Neurological disorders can increase the risk of severe disease in children.

Evidence presented during the meeting further shows that disadvantaged populations, such as minority groups and indigenous populations, are disproportionately affected by severe disease. Although the reasons for this heightened risk are not yet fully understood, theories being explored include the greater frequency of co-morbidities, such as diabetes and asthma, often seen in these groups, and lack of access to care.

Although the exact role of obesity is poorly understood at present, obesity and especially morbid obesity have been present in a large portion of severe and fatal cases. Obesity has not been recognized as a risk factor in either past pandemics or seasonal influenza.

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You've got to see the results of this CBS investigation.

 

They found that most assumed flu cases weren't even the flu, let alone H1N1. At most, 17% of those tested for the flu, had H1N1.

 

http://www.cbsnews.com/video/watch/?id=5405872n&tag=api

 

I posted about this elsewhere. Here and Effect Measure

 

 

If a patient has an influenza-like-illness they are assumed to have flu. Some (possibly most) patients will actually not have flu, but will have one of the other common respiratory viruses (adenovirus, rhinovirus, parainfluenza, etc.). There really isn't any treatment for those, and flu tends to be more serious, so cases of ILI are generally assumed to be flu.

 

When cases of ILI are low, the number of cases that are caused by influenza is low. As ILI cases go up, they are more likely to be caused by influenza. Here's a summary for 2004-2008 . The black line is percent positive. You can see that as flu increases, the percent of positive samples go up. At its highest, only about 30% of samples are positive. This is a very unusual year though, and I'd be surprised if we don't see a different pattern , with higher percent positives. Currently, it's about 37 percent. Anyway, it's probably true that much of what is being diagnosed clinically in outpatients isn't influenza.

 

 

 

labsummary07-08_small.gif

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Here is an article where the CDC said 1 in 5 kids had the flu...and it is followed by an update that "nope...nevermind that...we were wrong."

 

http://latimesblogs.latimes.com/booster_shots/2009/10/one-in-five-kids-had-swine-flu-this-month-cdc-says.html

Huh. I'm not reading that they said they were wrong. They said it was misinterpreted by the media. Which makes much more sense to me.

[update, 12:02 p.m. Oct. 23: Dr. Thomas R. Frieden, director of the CDC, said Friday in a news conference that the data was misinterpreted by news media and that it is highly unlikely that most of the cases were swine flu.
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This page at CBS shows some actual percentages that CBS found in their investigation. Numbers like:

 

Alaska had 722 flu test specimens:

1% had swine flu

5% had other flu

93% negative for flu

 

California had the most specimens of the ones shown at 13,704:

2% had swine flu

12% had other flu

83% were negative for flu

 

Florida had the highest swine flu percentage. Out of 8,853 specimens:

17% had swine flu

83% were negative for flu

 

 

So, we're hearing that if you have flu symptoms you probably have the swine flu but the actual test results (from before they stopped counting) show otherwise. Remember everyone was saying all flu is swine flu because it wasn't seasonal flu season? However, the test results showed that there was other flu going around. Not only that, but the results show that most of the people who had symptoms and were getting tested, didn't have any kind of flu, period.

 

ETA: Thanks Perry.

Edited by joannqn
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Huh. I'm not reading that they said they were wrong. They said it was misinterpreted by the media. Which makes much more sense to me.

 

I see your point. I just think there is a fine line here - I mean, the CDC really needs to be careful about their reports so as not to confuse people. I wonder if sometimes they don't lay blame on the media for their own mistakes.

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So, we're hearing that if you have flu symptoms you probably have the swine flu but the actual test results (from before they stopped counting) show otherwise. Remember everyone was saying all flu is swine flu because it wasn't seasonal flu season? However, the test results showed that there was other flu going around. Not only that, but the results show that most of the people who had symptoms and were getting tested, didn't have any kind of flu, period.

 

ETA: Thanks Perry.

 

:iagree: But then, doesn't that make this virus much less prevalent than normal flu? It either does that or makes the CFR much worse.

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That also makes the graphs posted confusing to me. Is the CDC just reporting the incidence of ILI then in the graph...of which up to 93% is not actually flu? How are they getting the different colored bars then that discern between types? SO does this mean, then, that there is a HUGE peak in people thinking they have the flu and running to the dr?

 

And then I think about one patient I read about who died from swine flu. They said they kept testing him and testing him and testing him (for DAYS) and the tests were negative. However, the autopsy finally showed that he did, in fact, have swine flu. Huh? How do cases like that play into this? Are all of those cases even really negative...even if they are tested the non-rapid way?

 

This is all so very frustrating.

Edited by Tree House Academy
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That also makes the graphs posted confusing to me. Is the CDC just reporting the incidence of ILI then in the graph...of which up to 93% is not actually flu? How are they getting the different colored bars then that discern between types? This is all so very frustrating.

The colored bars are all lab confirmed influenza. Look at 2006-07 (because it's easy to see the line). The colored bars are all the samples that were positive for flu, broken down by subtype. The solid black line shows that at the peak of influenza season, only about 30% of all ILI samples were truly flu. During the summer, less than 5% of people with ILI had flu. So if you have a fever and runny nose/sore throat in July, it's much more likey to be adenovirus, rhinovirus, etc. than influenza. In January, it's still more likely to be something besides influenza, but the likelihood of influenza has gone up quite a bit.

 

Like I said elsewhere, I would be surprised if those numbers don't go up this year, because this is not a typical flu season.

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I get that...but they are saying things are at a record high and such for this time of year. Isn't it possible, then, that this year's flu season will peak and then level out earlier than most?

 

Yes, it's possible, and since it is spreading so quickly I wouldn't be surprised if it did that. But overall, I expect more people will be infected with flu than in a typical year.

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Yes, it's possible, and since it is spreading so quickly I wouldn't be surprised if it did that. But overall, I expect more people will be infected with flu than in a typical year.

 

Thank you so much for all of your explanations and your devotion to answering all of our questions here. You are truly appreciated. :001_smile:

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