Final answer:
The prodromal stage is the interval from onset of nonspecific signs and symptoms to more specific symptoms. The illness stage is when a patient manifests signs and symptoms specific to a type of infection. The convalescence stage is when acute symptoms of an infection disappear. Option a is correct..
Step-by-step explanation:
The prodromal stage is the interval from onset of nonspecific signs and symptoms to more specific symptoms. During this stage, microorganisms grow and multiply and the patient may be capable of spreading the disease to others. Therefore, the patient may be in an isolation room to reduce the spread of infection. The illness stage is the interval when a patient manifests signs and symptoms that are specific to a type of infection. The convalescence stage is the interval when acute symptoms of an infection disappear. The incubation period is the first stage of the infection process; it is the Interval between the entrance of the pathogen into the body and the appearance of the first symptoms.
During the prodromal stage, the pathogen multiplies and the patient begins to show general but nonspecific signs and symptoms, and they may also be capable of spreading the infection. The illness stage then follows with specific signs and symptoms, and the convalescence stage is where symptoms subside.