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1
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An organism that lives in or on another organism and benefits at the other organism's expense
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2
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An out rake of a disease that affects many people in an area
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3
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A living cell invaded by a parasite
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4
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A weakened or dead pathogen that causes an organisms to develop immunity against that pathogen
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5
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One celled prokaryotes, some of which can cause disease
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6
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A one or many celled organism such as mushroom, yeast, or mold
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7
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An organism that transmits a disease
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8
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Able to spread easily
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9
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The ability of bacteria and other microorganism to resist the effects of an antibiotic
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11
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A disease that spreads around the world
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18
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The ability of an organism to resist disease
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