You wouldn't know that if you'd ever used an Amazon Prime account to watch the 2016 documentary "Vaxxed: From Cover-Up to Catastrophe."

Following criticism from Rep. Adam Schiff (D-CA), Amazon took down the documentary from its streaming video subscription service on March 1st.

The "Vaxxed" documentary aims to draw a link between vaccines and autism, but it relies on research from a discredited British doctor named Andrew Wakefield, who also directed the film.

What the movie doesn't tell you is that Wakefield's controversial and un-replicated research on the dangers of measles-mumps-rubella (MMR) vaccines has been retracted and debunked by years of rigorous studies.

One 2015 study looking at over 95,000 children across the US found no association between autism and MMR vaccines, even among kids who were already at a higher risk of developing autism.

"As the largest online marketplace in the world, Amazon is in a unique position to shape consumption," Schiff wrote in an open letter to Amazon CEO Jeff Bezos on Friday.