1) Who am I writing about? 2) Where did he finish a doctor degree? 3) When did he become a director of scientific studies of the École Normale? 4) Why is he famous? 5) How to get rid of bacteria from beer? 6) What diseases that Pasteur could explain?

Louis Pasteur was a French chemist and biologist who proved the germ theory of disease and invented the process of pasteurisation. He was born on 27th December 1822 in Dole of France. In 1847, he earned a doctor degree from the École Normale in Paris. After several years research and teaching in Dijon and Strasbourg. In 1854, Pasteur was appointed professor of chemistry at the University of Lille. He was able to demonstrate that organisms such as bacteria were responsible for souring wine and beer. And the bacteria could be removed by boiling and then cooling the liquid. This process is now called pasteurisation.

Then Pasteur undertook experiments to find where these bacteria came from, and was able to prove that they were introduced from the environment. In 1865, Pasteur was a director of scientific studies of the École Normale, where he had studied. He was asked to help the silk industry in Southern France, where there was an epidemic amongst the silkworms. With no experience of the subject, Pasteur identified parasitic infections as the cause and advocated that only disease-free eggs should be selected.

The germ theory of disease of Pasteur says that germs attack the body from outside. Pasteur now extended this theory to explain the causes of many diseases, including anthrax, cholera, TB and smallpox and also their prevention by vaccination. He is best known for his work on the development of vaccines for rabies. In 1888, a special institute was founded in Paris for the treatment of diseases. It became known as the Institute Pasteur. Pasteur was its director until his death on 28 September 1895.

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