We all know that Clay is appealing to unfiltered anecdotes, that upon serious study the anecdotes do not show that MMR causes autism, and that all serious studies of the connection between MMR and autism have failed to reveal any connection at all.
But is Clay even getting the number of anecdotes right? He keeps claiming that it is tens to hundreds of thousands. I decided to check this out by consulting
http://wonder.cdc.gov, a website that delivers VAERS data filtered by search criteria.
If you are not aware, VAERS is the Vaccine Adverse Event Reporting System. Anyone can submit a report claiming that some symptom followed vaccination. It is a passive reporting system to monitor vaccine safety. Point is, the database includes everything reported by anyone whether it makes sense or not, whether there is evidence or not, unless the person who submitted the report agrees to take it down (for example, someone claimed a vaccine turned him into the Hulk, and they contacted him to get his permission to remove this report).
Check out the disclaimer you must read before getting their data.
So let's see how many autism reports are in VAERS, using these search criteria:
I get 692 reports. With no restrictions other than reports of autism with MMR, we are already down to only 692.
To be generous, let's ignore the restriction to MMR vaccine and include all vaccines. Using these criteria:
There are now 1,032 results. In the history of VAERS, only 1,032 cases of autism have been reported as associated with vaccines.
To summarize, where are these tens to hundreds of thousands of reported correlations? I require evidence that the number of anecdotes, inconclusive as they are, is as high as claimed. The evidence I can find suggests otherwise.