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kekebab001 kekebab001
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6 years ago
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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CarmenBlackwellCarmenBlackwell
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6 years ago
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kekebab001 Author
wrote...

6 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
Mcb
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Yesterday
Thanks
wrote...

2 hours ago
Good timing, thanks!
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