focus of infection

Translations
очаг инфекции
инфекционный очаг
очаг инфекционного заболевания
Definitions
A localized site in the body where pathogenic microorganisms are present and an infection is concentrated.
In epidemiology, a place, population, or group in which an infectious disease is present and from which it can spread.
Words
focus

noun
очаг
of

preposition
из
infection

noun
инфекция