Landsteiner was an Austrian-born American medical researcher who was awarded the 1930 Nobel Prize in Physiology or Medicine for his discovery of the four basic human blood groups—A, B, O, and AB—which enabled the first successful blood transfusion to be performed in 1907. He was also involved in the discovery of the polio virus, and he helped identify the human blood protein known as the Rh factor. In the 1930s, Landsteiner successfully cultured the organism that causes what disease? Discuss