Thirteen achievements in medicine:
Andreas Vesalius's anatomical charts
-William Harvey's breakthrough on blood circulation
-Karl Landsteiner's identification of blood groups
-The development of anesthesia
-Wilhelm Roentgen's discovery of X-rays
-Louis Pasteur's establishment of bacteriology
-Frederick Hopkins's recognition of the importance of vitamins
-The discovery and isolation of penicillin
-The development of sulfa drugs
-Edward Jenner's invention of vaccine
-The discoveries of insulin, oncogenes, and the human immunodeficiency virus (HIV)
