Must Watch: time lapse CONTAGION billboard made of bacteria and fungi

Here is a cool bit of viral marketing for Steven Soderbergh's Contagion. In New York City there are tons of cool billboards, but this is so creative and unique. Check out the video below from Warner Bros. Toronto (via Cinemablend)

This billboard has me in the mood to wash my hands, and I am sure that after seeing the film it will be worse. What are your thougths?