Bird Flu
 

I just read this article on Yahoo and was mildly surprised by this quote:

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We at WHO believe that the world is now in the gravest possible danger of a pandemic," Dr. Shigeru Omi, the WHO's Western Pacific regional director, said Wednesday.
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He said the world is "now overdue" for an influenza pandemic, since mass epidemics have occurred every 20-30 years. It has been nearly 40 years since the last one.

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Is this a sound argument?

Re: Bird Flu
 

This is not a pure math question. Whether or not a long spell without an epidemic makes one more likely needs to be answered empirically. It's not clear what forces are at work here.

Re: Bird Flu
 

I'll have a flu-shot please. Bird flavor, thanks.

Re: Bird Flu
 

[ QUOTE ]
This is not a pure math question.

[/ QUOTE ]

Good point.

Thing is, we could say that about any application of math to an actual physical phenomenon. Questions involving the distribution of cards dealt or coins flipped aren't really pure math questions either, but I wouldn't argue that "I'm due for pocket aces." At least not around here. [img]/images/graemlins/wink.gif[/img]

It appears to me that Dr. Omi is appealing to probability to argue that we are more likely to see this pandemic occur now than we were in the past. So whatever the underlying reality, I don't think his argument holds water. Or am I missing something?

Re: Bird Flu
 

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I'll have a flu-shot please. Bird flavor, thanks.

[/ QUOTE ]
I'm just getting over the flu. Ugh. I'll take one too.

Re: Bird Flu
 

Aren't we also like several thousand years overdue for a global ice-age? That, coupled with the bird-flu, could really ruin my day.

Re: Bird Flu
 

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Aren't we also like several thousand years overdue for a global ice-age? That, coupled with the bird-flu, could really ruin my day.

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We immunized ourselves against the ice-age by pumping CO2 into the atmosphere. I fear we may have overdone it, though. [img]/images/graemlins/frown.gif[/img]

Re: Bird Flu
 

[ QUOTE ]
We immunized ourselves against the ice-age by pumping CO2 into the atmosphere. I fear we may have overdone it, though.

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Speak for yourself.... Currently -24 C as I type this...brrrrr!

Note: this is a humour posting, not an attempt to debate global warming! All replies will be politely ignored!

Re: Bird Flu
 

it is valid to say that each year's flu is not an independent outcome. there is a sequence of events that will lead up to the next pandemic. however, i really don't know how much this actually effects the outcome. so if we go 50 years without a pandemic the odds of one happening would be higher than if we just had one 2 years ago but i don't know if there is any way to say if it is 2% higher or 50% higher.

Re: Bird Flu
 

[ QUOTE ]
Thing is, we could say that about any application of math to an actual physical phenomenon. Questions involving the distribution of cards dealt or coins flipped aren't really pure math questions either, but I wouldn't argue that "I'm due for pocket aces." At least not around here.

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It's not really analogous. Coin and card questions really are pure math, or at least they are so close to it that the assumption is okay to make. Of course, you could argue that which side a coin lands on is not really random -- since its determined by the laws of physics -- but its behaviour is almost perfectly described by the assumption of randomness. Saying you are "due for a head" is incorrect. It is not clear that saying we are "due for a flu epidemic" is incorrect, although it might be. That is, we have mounds of evidence that coin flips are independent of one another. There is no such evidence -- at least not that I know of -- that flu epidemics are.

gm