On June 17, of 1950 US surgeo R.H. Lawler performed the first human kidney transplant.
In 1950 some scientist took one cows fertilized egg, put it into another virgin cow and the virgin cow gave birth in the normal way.
In 1952, on March 8th, an artificial heart kept a 41-year-old man alive for 80 minutes at the Pennsylvania Hospital.
Doctor Jones Salk developed a succesful vaccine in 1952. That vaccine was polio.
Dr. Jones Salk made the vaccine of 3 mixtures of viruses, grown in Monkey Kidney cultures.
President Roosevelt had the Polio visus.
On the 15th of December 1952 Christine Jorgensen had several hormone injections to change her gender. She went to Denmark for the series of operations where the world's first sex-change operation took place. Her name is now George. (According to other sources Christine Jorgensen was a man to begin with. She had the operation to
become a woman.)
In 1953, the first heart-lung machine is developed by doctor John Gibbon.
On April 25th, 1953 American biologist James Watson and English biochemist Frances Crick made a structure of DNA and how the chromesomes are arranged.
On February 12th 1954 A U.S. study linked smoking with cancer.
In 1958, Wilson Greatbatch invented an artificial pacemaker to control heartbeats.
