Peter Medawar

Peter Medawar was born a long, long time ago, in 1915. He was born in Brazil but was also a citizen of Britain. Imagine having two passports!

He went to a special school called Marlborough College and then to Oxford University, which is like a super-smart college for grown-ups. He loved learning about animals and how living things work. He became a professor, which means he taught other people at universities.

He was a very curious person who loved to ask questions about science.

Our bodies have a special defense team called the immune system. It's like a superhero squad that fights off germs and sickness. But sometimes, this team can be a bit too strong!

If a doctor needs to give someone a new organ, like a heart or a kidney, the immune system might think it's an invader and attack it. Peter Medawar discovered a way to teach the immune system to be calm and accept the new organ. It’s like telling your superhero team to be friends with a new helper!

Before Peter Medawar's big discovery, giving someone a new organ was very, very difficult. The body would usually reject it. But Peter and his friends figured out how to make the body accept the new organ.

This amazing breakthrough is called 'acquired immune tolerance.' It means the body learns to tolerate something new. Because of this, many people who were very sick can now get organ transplants and live much longer, healthier lives. It’s like getting a brand-new chance!

Peter Medawar was so brilliant that he won a very special award called the Nobel Prize. It’s like winning the biggest gold medal in the world for science! He shared this prize with another scientist named Sir Frank Macfarlane Burnet.

They won it for discovering how to make the body accept new organs. Peter Medawar was also known for being very funny and a great writer. People said he was one of the wittiest and cleverest scientists ever!