This is Marco Arturo. He's a 12-year-old science fan from Mexico.
Marco just completed an important investigation into the alleged link between vaccines and autism.
Marco said he had collected all the evidence in this folder.
"I think it might be because there is absolutely no evidence to support the statement that vaccines are linked to autism in any way whatsoever."
Marco laid out the case for why vaccines have saved countless people from diseases like measles, meningitis, and polio.
People from all over the world are sending messages of encouragement.
Marco's video has been viewed more than 3 million times and gotten tens of thousands of likes and comments on his page.
Marco told BuzzFeed News he made the video after a thorough investigation of the purported link between vaccines and autism, saying he reached his conclusions after two months of research.
Marco said he's always loved science, and he wants to be a researcher and science educator. "I want to become well known by people of all ages for what I've done with my life, and I want to do something big enough to change the world as we know it, giving me a place in history."
He said that while most of the feedback he's gotten to his video has been positive, there have been some haters, too.
"Some people tell me I should have been aborted, others tell me I'm an annoying autistic child, and others that I'm the living proof that vaccines cause retardation."