Item from Invincible by Robert Kirkman
A biological weapon that nearly wiped out the Viltrumite species — the reason there are fewer than fifty of them left, and the reason they're desperate enough to breed with aliens.
The Scourge Virus was developed from Viltrumite DNA and specifically targets their biology — it's the species-level weapon that turned an empire of billions into a species of fewer than fifty. The virus deactivates Viltrumite powers and kills within days to weeks. Only Viltrumites with exceptionally strong immune systems survive, which is why Thragg views the survivors as genetically elite. The virus fundamentally changed the Viltrumite strategy from conquest through force to survival through breeding — it's why they need planets with compatible species, and why hybrid children like Mark and Oliver are so strategically important.
Not visible to the naked eye — manifests as a progressive weakening of Viltrumite physiology. Infected Viltrumites lose their strength, invulnerability, and healing factor before succumbing. The virus itself is a biological weapon rather than a physical object.
Also known as: Scourge Virus, The Scourge