Mother Virus

Strain XA Mother:

The most successful Virus strains developed a sense of self-preservation which in this strain becomes extended quite far indeed. This virus, whether in control of a ship, a fleet, or some stationary computer complex, adopts a local community of Humans or other lifs, and protects them. In some cases, this protection is logical, as the humans provide maintenace or refueling services, but in other cases, the vampire just seems to like them. This strain will do battle with other vampire ships in order to protect its pets.

- Source: Traveller: The New Era