Infections
Definition
An infection is a condition in which viruses, bacteria, fungi, or parasites enter the body and cause a state of disease. Such invaders are called pathogens. They damage cells of the body by adhering to and damaging the cell walls, releasing toxic substances or causing allergic reactions. The body has a set series of responses to infection, which mostly involve body chemicals, body tissues, and the immune system. It was recently reported that infection is the fourth leading cause of death in the United States and kills more people than cancer and heart disease combined.
Description
Pathogens are everywhere in a person's daily environment: They may enter the body through breathing, ingested food or
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