Multiple choice

Who postulated that disease is produced by invisible living creatures?

  1. Ignaz Semmelweis

  2. Robert Koch

  3. Roger Bacon

  4. Walter Reed

  5. Paul Ehrlich

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

During the thirteenth century, Roger Bacon (1220-1292) postulated that disease is produced by invisible living creatures.