Macrovirus (fiction)

A macro virus is a fictional construct to describe a virus that is larger than usual, e.g. beyond the need of a microscope for the human eye to see it. As with real life viruses, they need other creatures to survive through a parasitic or carnivorous relationship.

Examples include:
*The Ripley, a parasitoid macro-virus from the film "Dreamcatcher" and the novel by the same name by Stephen King
*The un-named macro parasitoid virus featured in an episode of "" titled "", which had a lifecycle of starting as a virus creating bubonic plague-like boils on the skin, to a series of fly-like creatures which escaped from the boils, to a large-to-medium sized flying clawed creature with large circular serrated mouth and infecting proboscis. Victims died from the effects of the virus but the fly forms of the virus/parasite remain dormant in dead bodies until another creature comes nearby.
*The Khaara from the "Half-Life" mod Natural Selection. Though predominantly an airborne virus, is able to manifest itself into various forms and structures.
*The Flood in the Halo franchise reproduce virally, and also create zombie-like hosts.