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H1N1 + seasonal flu "aseasonal"

WTB

Resident
Doctors testing patients for the new swine flu virus say they are finding many cases of seasonal flu.

About half of people testing positive for influenza in the United States these days are infected with the new virus, the U.S. Centers for Disease Control says. But that means the other half are testing positive for seasonal flu viruses at a time when flu activity generally wanes sharply in the Northern Hemisphere.

The CDC said part of the increase is due to much more influenza testing because of concerns about swine flu. But the agency said it seems that it's not just a case of more testing, but more flu too.

"We would be expecting to see the season slowing down or almost completely stopped from the kinds of surveillance systems that we normally monitor," said Dr. Dan Jernigan deputy head of the CDC's influenza division.

"But what we're seeing is that there are some areas that actually have reports of the amounts of respiratory disease that are coming into their clinics that are equivalent to peak influenza season, and so that's an indicator to us that there's something going on with the amount of influenza disease out there."

Dr. Allison McGeer, head of infection control at Mount Sinai Hospital, said about 20% of people who are being tested for influenza-like illness in Toronto are testing positive for flu. That's about the level of positive tests one would see during the peak of flu season, she said. About half of those positive tests are for the new swine flu virus, McGeer said.

Dr. David Patrick of the B.C. Centre for Disease Control said there has been a sharp increase in doctor visits, but no increase in things like deaths due to pneumonia or influenza, which would be expected if there was an increase in cases.

Meanwhile, Mexico says tests have confirmed two more deaths from swine flu, bringing that country's toll to 68. The health department says one person died Tuesday while the other died in Mexico City on May 2.

The department says tests confirmed 207 more cases for a total of 3,102, including the deaths.

But Mexican officials say its epidemic is declining. Only five of the people who have died fell ill after April 23, when Mexico first announced the outbreak.

In Quebec, meanwhile, the number of people diagnosed with the H1N1 flu in Quebec has now reached 71. All the cases are mild and the patients have either recovered or are recovering. :surrender:

http://www.torontosun.com/news/world/2009/05/17/9483651-sun.html

wtb
 
Re: H1N1 + seasonal flu "aseasonal"

The CDC said part of the increase is due to much more influenza testing because of concerns about swine flu. But the agency said it seems that it's not just a case of more testing, but more flu too.

I wonder to what extent this apparent increase in seasonal flu is just an artifact of people's increased concern about flu in general. In the past, someone with mild flu symptoms out of season might just shrug it off. "Had a touch of the flu," or something like that. Now, with the concern about swine flu, I think more people might be reporting the mild symptoms they would have thought nothing of in the past, and so they're more likely to be tested and to show up as an "aseasonal" flu case.

And I wonder whether anyone has investigated the influence of widespread air conditioning on flu seasons. In many places now, indoor temperatures and humidity vary little from winter to summer. The so-called "seasonal flu" might have its season extended for that reason alone.
 
Re: H1N1 + seasonal flu "aseasonal"

The worse case would be that Swine H1N1 and H1N1 are both circulating together in the same area.

Or. They are not telling us the truth. This makes me think it is a lie...unless it already has mixed, and reads after testing as seasonal H1N1. :confused:

said about 20% of people who are being tested for influenza-like illness in Toronto are testing positive for flu. That's about the level of positive tests one would see during the peak of flu season, she said.
 
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