Multiple choice

Who discovered the polio virus?

  1. Salk and Sabin

  2. Karl Landsteiner and Erwin Popper

  3. Hilary Koprowski

  4. Robert Koch
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Karl Landsteiner and Erwin Popper discovered poliovirus in 1908 by proving that it was not a bacterium that caused paralysis, but a much smaller entity - a virus.

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