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Biology 17 Online
OpenStudy (anonymous):

are a weakened or mild form of a disease that causes permanent immunity fro the disease when injected into the body. A. Vaccines B. Insulins C. Hormones D. Bacteria

OpenStudy (zale101):

A Vaccination

OpenStudy (anonymous):

A

OpenStudy (anonymous):

A, vaccination

OpenStudy (anonymous):

yup ....i agree with u guys ...its A: Vaccines............... :)

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