You are accessing a resource from the BioInteractive Archive. Archived resources are not updated to reflect current scientific knowledge, technology, and/or pedagogy.
Viruses are genetically and structurally diverse. Each virus is specific about the host species, and even the cell it infects within the host. It is not known how many different viruses there are, but estimates run in the millions. This poster illustrates the wide variety of viral size, geometry, and genome type.
(This poster is designed to be printed at a maximum size of 29.5" x 23.5".)