Oswaldo Gonçalves Cruz, better known as Oswaldo Cruz (; August 5, 1872 – February 11, 1917), was a Brazilian physician, pioneer bacteriologist, epidemiologist and public health officer and the founder of the Oswaldo Cruz Institute. He occupied the fifth chair of the Brazilian Academy of Letters from 1912 until his death in 1917. Early years Oswaldo Gonçalves Cruz was born on August 5, 1872 in São Luis do Paraitinga, a small city in São Paulo Province, to the physician Bento Gonçalvez Cruz and Amália Bulhões Cruz. As a child, he moved to Rio de Janeiro with his family. At the age of 15 he started to study at the Faculty of Medicine of Rio de Janeiro and in 1892 he graduated as a medical doctor, with a thesis on water as vehicle for the propagation of microbes. Inspired by the work of Louis Pasteur, who had developed the germ theory of disease, four years later he went to Paris to specialize in bacteriology at the Pasteur Institute, which gathered the great names of this branch of science of that time. He was financed by his father-in-law, a wealthy Portuguese merchant. Career Work in Brazil Cruz found that the seaport of Santos was ravaged by an epidemic of bubonic plague that threatened to reach Rio de Janeiro, and engaged himself immediately in the combat of this disease. The mayor of Rio de Janeiro authorized the construction of a plant for manufacturing the serum against the disease which had been developed at the Pasteur Institute by Alexandre Yersin and coworkers. He asked the institution for a scientist who could bring this know-how to Brazil. The Pasteur Institute responded that such a person was already available in Brazil: Dr. Oswaldo Cruz. On May 25, 1900, the Federal Serum Therapy Institute was created, intended for the production of sera and vaccines against the bubonic plague, with Baron Pedro Afonso as director general and the young bacteriologist Oswaldo Cruz as technical director. The new institute was established in the old farm of Manguinhos at the western shores of Guanabara Bay. In 1902, Cruz accepted the office of director general of the institute and soon expanded the scope of its activities, now no longer restricted to the production of sera but also dedicated to basic and applied research and to the building of human resources. In the following year, Cruz was appointed director general of Public