Animation: The Spread of a New, Mutated Virus

"Antigenic shift is the process by which at least two different strains of a virus (or different viruses), especially influenza, combine to form a new subtype having a mixture of the surface antigens of the two original strains."
- Wikipedia: Antigenic shift

________Animation from HybridMedical - "The world's premier provider of high-end 3D medical & scientific animation and illustration."
Thanks again to BL.