Which of the Following Is True of the Salk Vaccine

question 66

Multiple Choice

Which of the following is true of the Salk vaccine against the polio virus?

• A) It contains a virus which has been inactivated by treatment with formaldehyde.
• B) It contains a mutated form of the virus which is temperature sensitive.
• C) It contains a very small amount of the natural virus.
• D) None of the above is correct.

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