Analysis of Anti-Vax Graphs

 Posted by on November 3, 2010  Add comments
Nov 032010
 
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READ THE FULL ENTRY AT SOFTWARE 3D.COM

by Robert Webb

The anti-vaccine movement sometimes presents graphs to support their cause, supposedly to show that diseases were on the decline before vaccines came along, and that vaccines had no effect. Graphs seem hard to argue with. They look scientific, represent actual data, and are compelling to many people. And indeed a good graph should be compelling. But their graphs are not good. Let’s have a look at how the true data, which supports the fact that vaccines have had a huge positive effect, can be manipulated to manufacture the conclusion the anti-vax movement wants.

Death rates

Firstly, most of the graphs they show are of death rates, not infection rates. Yes, death rates dropped significantly before vaccines were introduced because other improvements in medicine and sanitation meant that we were better at treating the disease, but it does not indicate that less people had the disease to begin with.

They also tend to show graphs going back a long time to when death rates for common diseases like measles were very high. To fit these high figures on the graph it’s necessary to scale down all the figures, meaning that by the time the vaccine is introduced you can no longer see any drop it may have caused in deaths.

They never show graphs of death rates from third world countries where due to poor sanitation etc. death rates for diseases like measles can still be quite high.

Here’s a nice graph though showing both infection and death rates in the US and it’s clear from both that the 1963 vaccine had a huge effect.


Source: http://www.iayork.com/MysteryRays/2009/09/02/measles-deaths-pre-vaccine/

The anti-vaxxers claim (e.g. here) that death rates are more reliable than infection rates because they don’t trust the diagnoses made by doctors. The idea is that doctors are biased against diagnosing a disease if the patient has been vaccinated against it. But if the symptoms match, why wouldn’t they test for it? We all know that vaccines are not 100% effective. The above graph shows that infection and death rates are very closely matched, year by year, so it seems that the doctors’ diagnoses match the coronors’ reports, so where’s the evidence for this supposed misdiagnosis?

Infection rates

So the best way to see if a vaccine worked is to look at infection rates. I’ve only seen one infection graph presented by the anti-vax side (in several places, but I found it on the AVN website), so let’s look at that in some detail. Here it is:

This graph has already been demolished on Science-Based Medicine, so I’ll try not to repeat too much of that, though I need to recap a little. Mostly what I want to show is some new graphs (the big ones further down) that help explain what Dr. Obomsawin did to create the graph he wanted.

Dr. Obomsawin gives his source for the graph as here:

But a better graph of the same data, where actual data points are shown, can be seen in here:

So what’s wrong with the graph?

Here’s some (but not all) of the ways that this graph deceives us.

  • First, note the slight difference between these last two graphs. The latter graph shows a different point in 1959, before there was a ten year break in national reporting of measles. It appears to be a glitch in the former graph, showing a data point in 1959 when no data is available for that year. My guess is that the graph was made as if all data points were equally spaced, then the ten year gap was inserted, giving the impression that the graph dips down before the introduction of the vaccine, when in fact the dip should be spread across the gap in reporting where the vaccine was introduced. Dr. Obomsawin’s graph makes good use of this non-existence point. I have recreated his graph over the top of the best version of the original graph:
  • You’ll also notice immediately that his graph looks nothing like the source graph. This is because he has only used a data point every 12 years. So he has taken a graph with 68 data points, and used only 5 of them! When accused of cherry picking the data, he responds:
    • “the data was not selectively “cherry picked”, but rather consistently spaced giving accurate data for every 12th year running from 1935 to 1983, a period which is roughly equivalent to a half century.”

    But cherry picking can still involve evenly-spaced data. Why every 12 years? Why starting at 1935? I’ll show you exactly why this is so important. Simply start at 1933 instead. We’ll even keep Dr. Obomsawin’s arbitrary choice of 12-year spacing. Here’s what you get:
    Yep, it looks completely different, though I’m using exactly the same technique as Dr. Obomsawin to generate this graph from the same original data.

READ THE FULL ENTRY AT SOFTWARE 3D.COM

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  6 Responses to “Analysis of Anti-Vax Graphs”

  1. I have a particular hate for the deliberate misuse of graphs by people like John Stone & Clifford Miller (“childhealthsafety”) and Obomsawin.

    Thank you for an elegant demonstration of their duplicity and dishonesty.

  2. Vaccines have never protected anyone, nor saved anyone’s life, let alone the life of millions. Remember – correlation does not equate to causation!

    Vaccination is an organised criminal enterprise dressed up as disease prevention.

    Graphs based on official infectious disease mortality statistics from various countries clearly show that vaccination is a complete and utter fraud.

    http://www.facebook.com/album.php?aid=273083&id=69667273997

    The sooner this nonsense stops and we again have a vaccine-free world, the better.

  3. That’s so unbelieveably dishonest and disingenuous. Words fail. Thanks for the reveal.

  4. Looks like Alber wants a vaccine free world…and then what? A disease full world!!! He actually believes that the decrease in diseases was not caused by vaccination….he cites the correlation fallacy. True, we have to watch out for that, but how would HE explain the coincidence of vaccines and lower death rates? Unless he can do that, his comments are meaningless.

    • Hey, Bruce… Alber is, you know… one of those people. Someone who obviously needed a hobby, but was a late bloomer in life when it came to that. The result being that when he finally found his calling as an armchair pundit, he grasped on to it like a drowning man to a stone.

      Now, for him, this is fine and good, but there’s the danger. That danger being that no hobby is fun alone, unless you’re one of those odd fellows who has booby traps at the front door and collects newspapers from as far back as the 1900′s. So, through the power of the Internets, one is inclined to pull other people with soft thoughts and malleable minds into your loop of woo with carrots on sticks in the form of junk science and skewed data.

      And they fall for it too.

      From there, Alber has a happy, cascading snowball constructed of attaboys, asspats and everyone drinking unicorn giggles together. Now he simply CAN’T be wrong, because he has all these people agreeing with him! It’s his perfect universe, albeit one made of flawed logic. When reason comes to call, wielding that nasty flamethrower of those pesky things known as “demonstrable facts”, why, he just adds a few more snowy layers of that junk science and attempts to keep the ball rolling, because admitting you’re wrong is just embarrassing, ya know?

      Through the humour above, what I’m really trying to get across, is that Alber is the WORST kind of “champion” for any cause. The kind who find the cause and jump in heart and soul based on the worst possible data. They refuse to assimilate and analyze any other data, because it doesn’t fit with what they’ve already been inducted with, plus they fail to realize how utterly foolish and incredulous the totality of what they’re saying is, because they refuse to step back and see what they’ve written as a whole.

      The hilarious part, is that I’m new to this thing. I mean, I knew there was some manner of debate in the vax vs. anti-vax realm, but I didn’t know it was such a… *thing*. Until someone showed up in a discussion throwing around “information” that one couldn’t help but call shenanigans on; I mean, “latex is used as an active preservative in almost all US vaccines”?? Really?? Once that one made my brain go “klonk” and I did some follow up research to this clown’s “points”, I knew which side I was on and, more importantly, WHY. It took less than 12 hours from there to here (had to sleep, ya know?)

      However, I’ve always found, in any debate anywhere, there are always people like Alber who do their side of the issue far more harm than good.

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