1. Medicine: Past and Present
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2. epidemic
noun
a rapidly spreading disease

3. plague
noun
a destructive epidemic disease

4. germs
noun
tiny plants or animals that cause disease

5. infected
adjective
having disease germs present

6. microbes
noun
tiny organisms or germs too small to be seen without a microscope

7. antibodies
noun
substances produced by the body that destroy or weaken germs

8. immune
verb
protected from germs

9. bacteria
noun
germs

10. vaccine
noun
a preparation of weakened germs used to protect a person or animal from a disease

11. sterilize
verb
to make free from germs