The confinement of an infection to a limited area(noun)
The act of bringing into focus(noun)
WordNet. Princeton University. 2010.
Use "focalisation" in a sentence
"I mean the whole kit-and-kaboodle: the overall structure, and the narrative, the pacing and focalisation, the characterisation, the dialogue, the tone."
"Attenuated focalisation often works subtly in conveying the impression that we are momentarily restricted to the visual range of a particular character."
"The narrator may see something which (at that point) he cannot make out, and that vagueness of vision is conveyed as attenuated GENIUSROI | 14 focalisation."