They lying through their teeth.
It should be interesting to see what comes of this. It is widely believed that mercury is vaccine is the cause of the increase in autism. However study after study has proven this to be untrue. We may be able to see of the studies are correct or not. If autism rates continue to climb in states were it's use is ban it will free up the medical community to look in new directions
"a mercury-based compound added to some vaccines"
I heard they're replacing them with arsenic-based vaccines. Don't worry, they're safe.
/end sarcasm
I've been looking for a flu shot without mercury, but I haven't seen it around here.