This science animation was developed for Zirus, a biopharmaceutical company that was working on the development of a new class of antivirals.

This video excerpt, taken from a larger program developed for Zirus, uses the H1N1 influenza-A virus to example the mechanism of action a virus takes to infect a host cell. Animation from this video was used by Robert Krulwich of NPR for a story on how the flu virus invades your body.