What is caused by organisms or viruses that enter and multiply within the human body.

What is the openings into your body, such as your mouth, eyes, and nose, are covered by these protective linings.

What is strep throat, lyme disease, bacterial meningitis, tb,

What is a deadly flu outbreak an example of?

What is your body's general response to all kinds of pathogens?

What is organisms so small they can only be seen by microscope.

What is the white blood cells engulf and destroy pathogens.

What is caused by the streptococcus

What is an infectious disease that has become increasingly common in humans within the last 20 years.

What is acquired from outside your own immune system

What is a single-celled micro-organisms

What is the system that fights disease by producing a seperate set of weapons for each kind of pathgen it encounters.

What is caused by an infected tick with this disease.

What is a flu that results in close contact with an infected bird?

What is acquired from having a disease or from receiving a vaccine.

What is the smalles pathogen

What is are the three types of T-cells

What is a highly contagious bacterial infection of the lungs and transmitted when droplets from an infected person's cough or sneeze.

What is a virus caused by a bite of infected mosquito.

What is the reasons why diseases emerge?

What is single-celled organisms that are much larger and more complex than bacteria.

What is are the proteins that attach to surface of pathogens or to the toxins produced by pathogens.

What is the common cold, influenza, pneumonia, and hepatitis

What is change in a pathogen

What is an example of a disease caused by a protozoan.