For the people who care about the specifics of the video, youtube user axxsmith commented on the video saying, “This was filmed by David Rogers at Vanderbilt in the 1950s. It is a neutrophil chasing Staph aureus. Notice how it relentlessly chases the first one. This process is called chemotaxis.”

I just thought it was cool seeing our white blood cells at work. Somebody needs to add the Benny Hill song to this video.