spillover

IPA: spˈɪɫoʊvɝ

That which overflows; the excess or side effect.
(epidemiology) The spread of infectious disease between different species of animal and particularly to humans.

spill over

IPA: spˈɪɫˈoʊvɝ

to enter into another zone by way of accident or overcrowding; to overflow
(intransitive) (of an infectious disease) to spread from one species of animal to another and particularly to humans
(intransitive) (of a bad emotion, situation, etc.) to reach a climax

The spill-over from the Horseshoe Bar, Siobhan knew—and as incongruous as they looked, she also knew it was ever thus on match days.
The Canadian and American economies' high level of interconnectivity means that developments on one side of the border will have spill-over effects across the border.
That same operative made the case that there would be good spill-over news coverage in neighboring Pennsylvania, where Rep. Joe Sestak (D-Penn) is hoping to make inroads in his own Senate race.
Mr. Carney said European authorities could reduce the spill-over of deleveraging by having their banks meet at least part of the new requirements through private capital, including so-called contingent capital, an idea championed by Canada.
This "spill-over" effect of games means that young people who identify strongly as gamers have real-world talents and strengths that will indoubtedly serve the well in the future -- if they understand that these are real skills and abilities, not just virtual ones.