Viruses, Viroids, and Prions
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Vaccines

An attenuated virus is a weakened, less vigorous virus

“Attenuate" refers to procedures that weaken an agent of disease (heating)

A vaccine against a viral disease can be made from an attenuated, less virulent strain of the virus

Attenuated virus is capable of stimulating an immune response and creating immunity, but not causing illness

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Interferon are naturally occurring proteins made by cells to fight viruses

Genetic altering of viruses (attenuated viruses)

Antiviral drugs (AZT)

Protease inhibitors – prevent capsid formation

Slide 65

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