La Nina ‘may abet’ flu pandemics

By Richard Black
16 January 2012 Last updated at 20:03

http://www.bbc.co.uk/news/science-environment-16577612

La Nina events may make flu pandemics more likely, research suggests.

US-based scientists found that the last four pandemics all occurred after La Nina events, which bring cool waters to the surface of the eastern Pacific.

In Proceedings of the National Academy of Sciences (PNAS), they say that flu-carrying birds may change migratory patterns during La Nina conditions.

However, many other La Nina events have not seen novel flu strains spread around the world, they caution.

So while the climatic phenomenon may make a pandemic more likely, they say, it is not sufficient on its own – and may not be necessary either.

La Nina is the cold cousin of El Nino – the two collectively making up the El Nino Southern Oscillation (ENSO).

“Certainly ENSO affects weather and precipitation and humidity around the world,” said Jeffrey Shaman from Columbia University in New York.

“But the effects are very varied around the world – there’s no coherent picture.”

Nevertheless, the last four pandemics – the Spanish Flu that began in 1918, the Asian Flu of 1957, the Hong Kong Flu of 1958 and the swine flu of 2009 – were all preceded by periods of La Nina conditions.

What pandemics have in common is that they all feature novel strains of the virus to which people have not developed immunity.

Typically these are created when two existing strains infecting an animal such as a bird or a pig exchange genetic material.

La Nina conditions emerge as a tongue of cold water (purple) in the eastern Pacific

The link to La Nina events is not clear. But recent research has shown that some wild birds’ patterns of flights and stopovers during migrations, or moulting times, differ between El Nino and La Nina years.

“Our best guess is this brings together birds [in La Nina conditions] that don’t otherwise mix, and that allows the genetic reassortment to take place,” Professor Shaman told BBC News.

Yet the fact that many other La Nina periods have not been followed by a pandemic indicate that other factors must also be involved.

If the swine flu pandemic of 2009-10 was part of this pattern, the crossing of viral strains must have had something to do with birds as well as pigs.

As wild migratory birds will sometimes visit farms and as domestic flocks of ducks or chickens often live alongside pigs, especially in developing countries, this is quite feasible.

Professor Shaman cautions that the link is far from being firm enough that it could be used as a tool to forecast pandemics.

But the monitoring of birds, pigs, people and the genetics of the influenza virus have all been stepped up in response to recent outbreaks of both swine flu and bird flu.

And this, he believes, should in time show whether the theory is correct.

“Now we can look at viral gene flow in a number of birds, pigs and people – and we might be able to get something more statistically robust, to get a better sense of the mechanisms.”


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3 Responses to LA NINA WEATHER SYSTEMS TO BE BLAMED AS A COVER FOR BIOLOGICAL WARFARE

  1. A new La Niña episode developed quite quickly in the eastern and central tropical Pacific in mid-2010,[4] and lasted until early 2011.[1] It intensified again in the mid-2011 and is predicted to last at least until early 2012.

    http://en.wikipedia.org/wiki/La_Niña

  2. United States Government Paid For Research Which Lead to Weaponized H5N1 Super Flu Virus
    http://theunhivedmind.com/wordpress/?p=19400

    London 2012: Mass gathering risks disease spreading
    http://theunhivedmind.com/wordpress/?p=20080

  3. These articles are used to condition the people to the idea of a pandemic and they’re also created so you’ll blame the wrong reasons for the flu attack which has been planned and released by The Worshipful Company of Fuellers. Its looking more likely that they’ll be releasing an avian flu virus within the next two years at most. They’ll do this in conjunction with the new economic system coming in which will make it easier to force biometric and implant Westerners. India right now is a test case for biometrics. All eyes on London 2012 and Chicago, British Secret Service may aerosol the H5N1 virus at the event.

    -=The Unhived Mind

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