Alan Cassels
Here we go again.
Every so often, criticism of the antivaccine movement builds to the point where it extends beyond the blogosphere to enter the national zeitgeist in a way in which people other than blogging geeks like myself start to take notice. It happened a few years ago, when washed up actress Jenny McCarthy teamed up with the antivaccine propaganda group Generation Rescue to sell her story of how she believes that vaccines caused her son Evan's autism and managed to score an appearance on The Oprah Winfrey Show. It happened again three years ago, as preparations for the H1N1 pandemic…