*Lesson 19: OPV Theory

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The third theory discussed in the documentary, “Why Us? Left Behind and Dying” is the OPV Theory.  This theory is the “polio vaccine” theory which purports that SIV entered humans through contaminated oral polio vaccines.  Unlike the “natural transfer” and “serial passage” theories, the major supporters of the “polio vaccine” are not scientists but journalists.  Like the other two theories, you can examine the theory using the Scientific Method to determine where you stand on the validity of the theory. 

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Lesson 19 – OPV Theory (Grayscale)
Lesson 19 – OPV Theory (Color)
Lesson 19 – OPV Theory (Color Ink Saving)

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