He was the founder of antiseptic medicine. He was inspired by this through observing Louis Pasteur's theory on microorganisms.
He realised that certain moulds killed bacteria. This discovery was made 32 years before Fleming's however his research went unnoticed.
Discovered penicillin which is now used as a medicine and helped save lives.
Discovered Pasteurisation making it safer to drink by heating things to a certain degrees killing all bacteria.
Contributed to the development of penicillin so that it could be used as medicine with the help of Alexander Fleming and Ernst Chain.
Was a researcher in the field of medicine Discovered that the body’s immune system can tell the difference between virus-infected cells and normal cells.