The oral polio vaccine contains what kind of viruses ________

Live viruses

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Killed viruses

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Heat killed viruses

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Harmful viruses

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Solution

The correct option is C Live viruses
Explanation: The oral polio vaccine contains a live attenuated virus, that is, the live virus that is capable of multiplying but generally incapable of causing infection. The injectable polio vaccine contains the killed virus.
So, the correct answer is 'Live viruses'

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