Hi, this film is about an alien (I think), which transfers between people. I don’t remember seeing the actual alien as I only watched part of the film. I remember a scene where the main character, maybe denzil Washington, was running in a very crowded street and not being able to catch the alien as it transferred from person to person. I think they had to touch to transfer. It may have been a virus or an alien or monster. It’s been bugging me for years.