This beautiful animated film explains how a viruses multiply. And when you watch this complex process, a great respect will grow for such sophisticated microscopic organisms. The animation is created by David Bolinsky, who is here talking to a reporter of the NPR. Their dialogue is the basis for the story, which is executed in a medical 3D animation. The film is for 5 years online now and viewed about 2 million times. NPR (the National Public Radio) is an independent American public institution that provides programs for broadcast stations.