Swine Flu Counter update Sept 2009

Here you'll find the September 2009 update of the

Global Swine Flu Counter

Although there is still an increasing risk of underreporting, the counter has been renewed on basis of the latest available global reports as provided by Wikipedia/ECDC.

Swine Flu under Control?
The September 2009 developments suggest the Swine Flu development is under control, as the reported infections changed from a exponential growth recent months, to more linear growth in August 2009. In September the increase of infections was already declining.

New Model
The above developments are the main reason why data in the Swine Flu calculator have now been modelled by a logistic function.
Well considered curve fitting at ZunZun, showed a Gompertz function (with offset) resulted in a satisfying approximation :



Life actuaries will be familiar with good old Gompertz. The Gompertz equations are - by the way - also used to model Plant Desease Progres.

The number of death have now been modelled ruffly as 1.8% of the infected people a month earlier [Death=0.018*I(t-30)]

Results update
The results the new approximation show that the number of reported infections increases asymptotically towards a limit of about 323,000.

Correspondingly, the number of death, , increases to a limit of ruffly 6000.

All provided the actual controlled development continues and no new mutation of the H1N1 will develop in the next months.....

Risk
The risk of underreporting is not negligible . Modeling on basis of excluding the September data would result in a limit of 528,000 infects and about 9500 deaths. We'll just have to wait how H1N1 develops.....
But as becomes clear, the explosion of swine flue cases looks under control.

If necessary, the counter will be updated again on a on a regular basis. The latest data you'll find in this XLS spreadsheet.

Install Swine Flu Counter
How to implement this Swine Flu Counter on your web site?

• Put the next HTML-script (without the outer quotes) just before the end of the body tag:' <script language="javascript" type="text/javascript" src="http://sites.google.com/site/boooming/actuary/swine-flu-2009-update1.js"> </script>'
  


• Put the next HTML-line (without the outer quotes) where you want the Swine Flu table to appear on your site :
  ' <div id="swineflutable"></div> '
  
  
• Ready!

Swine Flu Counter update 06-07-2009

Want a simple global Swine Flu Counter on your web page?

You may find the old (July 6, 2009) Counter/Calculator Here.
There is already a new counter on a more recent model available.
Look at : Swine Flu Counter Update-sept-2009

The (old) counter is based on a 'July 6, 2009 estimation' as described on Actuary-Info. However, now the data have been updated based on the official, more reliable and accurate WHO reports.



If necessary, counters will be updated again on a on a regular basis. The latest data you'll find in this XLS spreadsheet.

Install Swine Flu Counter
How to implement this old Swine Flu Counter on your web site?

• Put the next HTML-script (without the outer quotes) just before the end of the body tag:' <script language="javascript" type="text/javascript" src="http://jos.blogspot.googlepages.com/swine-flu-2009.js"> </script>'
  


• Put the next HTML-line (without the outer quotes) where you want the Swine Flu table to appear on your site :
  ' <div id="swineflutable"></div> '
  
  
• Ready!

Remember, you may only install one counter on your website, either the old or the new.

Paradox
The best what could and will happen with regard to the original swine flu model and corresponding counter, is that they don't turn out to be valid. This way the model and counter will have proven their 'reason for existence'. Simply just by contributing to the necessary awareness and prevention measures to diminish or stop the exponential swine flu infections growth.

Contrary, developing but not publishing models or counters will create a lack of warning and attention and would therefore prove the (exponential) model to become true. This is the inevitable paradox of modeling with our without follow up actions.

This paradox is the main reason why an 'actuarial advice' should therefore alway be presented in a (minimal) "two-way scenario" form:

• Estimation of results without follow up actions
• Estimation of results including advised follow up actions

Anyway, have fun with your Swine Flu Counter!

Joshua Maggid

ADD July 18, 2009
On July 16, 2009 WHO reports:

• Further spread of the pandemic, within affected countries and to new countries, is considered inevitable.
• This assumption is fully backed by experience. The 2009 influenza pandemic has spread internationally with unprecedented speed. In past pandemics, influenza viruses have needed more than six months to spread as widely as the new H1N1 virus has spread in less than six weeks.
• The increasing number of cases in many countries with sustained community transmission is making it extremely difficult, if not impossible, for countries to try and confirm them through laboratory testing. Moreover, the counting of individual cases is now no longer essential in such countries for monitoring either the level or nature of the risk posed by the pandemic virus or to guide implementation of the most appropriate response measures.

In short: now h1n1 really gets important and probably is running out of hand, WHO stops reporting.....
Let's see if we can find another source....

ADD July 21, 2009
Wikipedia's 2009 flu pandemic reports (based on ECDC reports, as WHO reports fail) an accumulated number of 143,652 reported infections and 899 deaths on July 21, 2009. As the WHO has decided not to registrate the number of infections anymore (as from july 9) and, except for the US, reports are based on confirmed laboratory test results, the actual number of infections will be much higher.

That's why, as long as the actual deaths are in line with the modelled estimated death, the 'July 6th exponential model', used as basis for the swine flu counter, seems still realistic and valid!

ADD Sept 06, 2009
The data have structurally changed from exponential to linear.
Take a look at the new counter at:

Swine Flu Counter Update-sept-2009