The vaccine is a substance incorporated in the body is able to prevent the development of disease. Most vaccines are made up of germs, dead or attenuated, which generate in the body a state of immunity against certain disease, or stimulate it to produce its own defenses. The findings of the French scientist Louis Pasteur, the father of microbiology, revolutionized medicine and led to the era of vaccines. In 1868 Pasteur in Paris, founded a laboratory dedicated to research of microorganisms. After incessant work in 1881, discovered the vaccine against anthrax, a disease fatal to cattle, and identified the virus that causes rabies. He spent the last years of his life to the study of preventive vaccines.
Among the diseases that can be addressed with vaccines include measles, rubella, tuberculosis, diphtheria, polio, yellow fever, hepatitis B, typhoid and scarlet fever.
On July 6, 1885 Pasteur first applied to rabies serum two days a child bitten by a dog before hydrophobic, and saved his life.