The movie Inception is excellent and I highly recommend it. There are a few references in the movie trailer, and the very first lines that Leonardo DiCaprio says in the movie mention memetic viruses and parasite. Here’s the dialog from the trailer.
“What’s the most resilient parasite? An idea. A single idea from the human mind can build cities. An idea can transform the world and rewrite all the rules.”
I’ve modified the trailer a little, but just the visuals, not the audio. Waddya think?