Differentiate between the signs symptoms of a localized vs systemic infection?

Scope of symptoms: A localized infection is an infected hangnail, for example, or a boil. Sometimes, a pneumonia can be a localized infection, as it is only located in one specific place, namely the lung. A systemic infection either can mean an infection that has spread to multiple areas and organs, or it can mean a violent reaction of the body to a localized infection, such as a pneumonia or abcess.