Q. Vaccination was started by.......

  • (A) Jonas E. Salk
  • (B) Paul Muller
  • (C) Robert Frost
  • (D) Edward Jenner
✅ Correct Answer: (D) Edward Jenner

Published by Praveen Singh ⭐ 36.81K Points at 13-Sep-2020 11:39 pm in Science

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