mass infection वाक्य

The Colonists pretended that mass infection of humanity by the black oil would make them a controlled slave race, but in reality the oil would " birth " new alien beings within the human hosts resulting in re-population rather than recolonization.
The plaintiffs alleged that the companies manufactured and sold blood factor products as beneficial " medicines " that were, in fact, contaminated with HIV and / or HCV and resulted in the mass infection and / or deaths of thousands of haemophiliacs worldwide.
If that was in fact the cause of the outbreak that killed three people, it suggests that a disease known to spread mainly in close quarters also has the potential to be used as a weapon of mass infection from farther away, perhaps from one end of a city to the other.