When the agency is undisclosed or partially disclosed, however, both the agent and the principal are liable. Where the principal is not bound because the agent has no actual or apparent authority, the purported agent is liable to the third party for breach of the implied warranty of authority.
The International Classification of Diseases (ICD) is the standard diagnostic tool for epidemiology, health management and clinical purposes. This includes the analysis of the general health situation of population groups.
Classifying Infectious Diseases. A patient may exhibit symptoms (subjective changes in body functions) and signs (measurable changes), which a physician uses to make a diagnosis. A specific group of symptoms or signs that always accompanies a specific disease is called a syndrome.he Severity or Duration of a Disease. The scope of a disease can be defined as: 1  Acute â develops rapidly but lasts a short time (influenza). 2  Chronic â develops more slowly, reactions to the disease are less severe, likely to be continual or recurrent for long periods (infectious mononucleosis, TB, hepatitis B).