Millions have watched a young boy's emphatic denunciation of the so-called "anti-vaxxer" movement.
The video, posted recently by a boy who lists himself as a "scientist," has been viewed 3.5 million times in the past week.
The clip starts with Marco Arturo pretending to be taking the other side of the debate, holding up a folder called "Evidence That Vaccines Cause Autism."
He then proceeds to dump empty sheets of paper out, declaring that there is "absolutely no evidence" to support the notion that vaccines cause autism.
Marco went on to argue that failing to vaccinate a child ends up exposing other children to potentially deadly diseases like polio, measles, meningitis or hepatitis.
Read more + video at FOXNews.com