The Investigation of disease is necessary in order to determine the cause and the severity of an outbreak.

Information associated with the cause can prevent and predict more outbreaks and gives health department official’s time to ensure treatment in order to prevent more people from becoming ill.

There are many communicable diseases and conditions:

Communicable disease can be spread from person to person and sometimes the illness can by a cycle or chronic condition.

Some diseases are passed on by direct or indirect contact with infected persons or with their excretions.

Most diseases are spread through contact or close proximity because the causative bacteria or viruses are airborne.