After a pregnant woman is possessed by an alien and gives birth, the child becomes the focus of a search as it may offer an immunity to Earth’s bacteria.

The aliens plan to disorganize human society by paralyzing its means of communication.

The aliens take advantage of humanity’s own violent nature in order to speed along its inevitable self-destruction.

The aliens have produced a deadly toxin, and a miraculous new development to feed the world becomes their means of mass poisoning.