So you're not causing disruption to the wider population, you have a case that comes in, you isolate them, you work out who they've come into contact with, who's potentially these opportunities for exposure and then you can follow up those people, maybe quarantine them, to make sure that no further transmission happens.
Sen causarlle alteracións á poboación xeral, se se atopa un caso  que xorde, íllase, trabállase para buscar con quen tivo contacto, quen tivo a oportunidade potencial de estar exposto e fáiselle un seguimento a esas persoas, póñense en corentena, para asegurar que a transmisión non continúa.