ONE - No danger of infection or contagion.
TWO - Moderate danger of infection or contagion. Standard sterilization procedures required.
THREE - Localized outbreak. Infected personnel to be quarantined.
FOUR - Virulent outbreak. Destruction of site and all associated personnel required.
FIVE - Extinction-level outbreak. Extreme containment procedures required. All personnel participating in, associated with or with knowledge of the outbreak site must be destroyed. All locations connected to said personnel to be destroyed. Where destruction is impossible, permanent containment is required.