Disease - Sickness or illness. Fever - A body temperature that is higher than normal. A normal body temperature is 98.6 degrees. Flu - A disease that causes fever, coughing and muscle pains. It is caused by a virus and can easily spread from one person to another.
Flu is short for influenza.
Fracture - A crack or break in a bone. Influenza - A disease that causes fever, coughing and muscle pains. It can be spread easily from one person to another. Influenza is also called flu. Immune - Protected from a disease.