By oracknows on April 4, 2017. Last week, I took note of something that antivaxers hadn't done in nine years, specifically a "march on Washington." Back in 2008, Jenny McCarthy and her then-boyfriend Jim Carrey led a rag tag rogues' gallery of antivaccine activists on a march and rally that they called "Green Our Vaccines." The name of the rally, of course, derived from a common trope beloved of antivaccine activists that I like to refer to as the "toxin gambit." It's basically a Food Babe-like fear of those "evil chemicals" writ large in a claim that vaccines are packed full of horrific chemicals that are Making Our Babies Autistic—and/or making them asthmatic, diabetic, or even dying of sudden infant death syndrome. It's a profoundly scientifically ignorant gambit in that the dose makes the poison and the amount of the various scary-sounding chemicals to which antivaxers like to point in vaccines is tiny and safe. For instance, antivaxers love to point to formaldehyde as one of those horrific toxins, and it's true. There are tiny amounts of formaldehyde in some vaccines left over from the process of inactivating the virus. However, the human body makes formaldehyde as a normal byproduct of metabolism in amounts that far surpass that contained in any vaccine.