A disease that can be passed person to person, or animal, or object
Communicable disease
Condition that interferes with the proper functioning of the body or mind
Disease
Disease causing organisms that are so small they can be seen through a microscope.
Pathogens
Condition that occurs when pathogens enter the body, multiply, and cause harm.
Infection
The smallest pathogens
Virus
Tiny one-celled organisms
Bacteria
Organisms that are more complex than bacteria but cannot make there own food.
Fungi
One-celled organisms that are more complex than bacteria.
Protozoa
Organism, such as an insect, that transmits pathogens
Vector
Cleanliness
Hygiene