it spreads
Examples
All life is a struggle for existence. Why should it cease to be a struggle if it spreads among the stars?
Privilege, you see, is one of the great adversaries of the imagination; it spreads a thick layer of adipose tissue over our sensitivity.
When one gets in bed with government, one must expect the diseases it spreads.
If you kiss someone on the back of the neck, it spreads.
When the roots of a tree begin to decay, it spreads death to the branches.
Once out of the throat it spreads over the world.