Final answer:
The nonspecific to specific symptom stage of an infection is the prodromal stage, which occurs after the incubation period. During this stage, the host experiences general signs and symptoms of illness. The prodromal stage is followed by the period of illness.
Step-by-step explanation:
The nonspecific to specific symptom stage of an infection is known as the prodromal stage. This stage occurs after the incubation period and is characterized by the pathogen continuing to multiply in the host, while the host starts experiencing general signs and symptoms of illness. These signs and symptoms are usually too general to indicate a particular disease. The prodromal stage is followed by the period of illness, during which the signs and symptoms of disease are most severe.