Give examples of diseases that can be prevented by vaccination.
Explain how viruses, bacteria, fungi and parasites may infect the human body and interfere with normal body functions.
Recognize that a microorganism can cause specific diseases and that there are a variety of medicines available that can be used to combat a given microorganism.
Recognize that the human immune system protects against microscopic organisms and foreign substances that enter from outside the body and against some cancer cells that arise from within.
Recognize that the body has defense systems against germs, including tears, saliva, skin, and blood.
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