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This set contains the key vocabulary words from the 4th grade Open Court Reading story: "Medicine: Past and Present".

plague

a disease that kills a large number of people
The Black _______ killed many people.

infected

having germs that cause a disease
His foot became infected after he stepped on a sharp ______.

microbes

tiny organisms or germs too small to be seen without a microscope
Use a microscope to view the ____________.

boxing

special substances produced by the body that destroy or weaken germs
________ fight germs.

bacteria

germs
________ can cause disease.

vaccine

special substances used to protect a person or animal from a disease
Did you get your flu ___________ yet?

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