It is known as a focus of infection to that place where there are high concentrations of an infectious agent, which can spread to much larger areas, being its effect much more notable. In the health field this concept is widely used to define those places from where a disease or any other infectious agent spreads.
The magnitude in terms of dimensions of the infection focus can be highly variable, since it is closely related to a series of elements, such as the origin of the infection, the probability that it will spread and the progress made with respect to the investigation of the same.
A focus of infection can be both large and small, since on the one hand it can be said that a focus of infection could be an entire community or, failing that, it could be a single individual, which is the carrier of some pathology of infectious type and with respect to which it is necessary to take sanitary measures, since otherwise said disease could be spread to large masses, becoming an epidemic, for this reason preventive measures may include the isolation of all human contact of said person or of the group of people who carry said infection, all with the aim that the damage is the least.
In the same way, it can happen with a specific site, that is, in a specific place there is some type of virus, which can be acquired by any individual that is in that place and therefore said infection can spread very quickly if not detected in time
Being able to have knowledge regarding the origin of a disease is of great importance, since thanks to the knowledge of it it is possible to appreciate the prognosis of said infection, as well as to deduce the infectious agents that cause it, which is very This is important since antimicrobials can be made with this, in the same way they can also create measures that focus on directly controlling the focus and not the transmission of the disease.