Editing Virion (section)

=== Viral envelope ===
{{Main article|Viral envelope}}

In many [[viruses|virus species]], the virion also has an outer membrane, the [[viral envelope]].<ref name="Dimmock2007"/> The envelope includes a [[lipid bilayer]] and surface [[proteins]], similar to the [[cell membranes]], that are usually used for the envelope construction when the virus is exiting the cell. This structure helps with attachment to the cell and also assists evading the [[immune system]] of the host organism while the virion is searching for a cell to infect.{{sfn|Reynolds|Theodore|2023|p=20}}