Instituto Butantan and production of sera. The Instituto Butantan also operate the "Hospital Vital Brazil", a specialist hospital that offers free treatment for poisonous animal stings and bites. The institute also accepts donations of serpents, arthropods and other animals captured by the public and by a network of collaborating centers and individuals. The following research laboratories are part of the Butantan Institute: Important Brazilian scientists who have worked in the Butantan Institute are: Vital Brazil, Afrânio Pompílio Gastos do Amaral, Isaias Raw, Samuel Pessoa, Willy Beçak. The Institute has strong collaborative ties with the Pasteur Institute, Paris, France, and with the Oswaldo
Oswaldo Cruz Hygiene and Demography in Berlin, Cruz was awarded with the gold medal in recognition of the sanitation of Rio de Janeiro. In 1909, he retired from the position as director general for Public Health, dedicating himself exclusively to the Manguinhos Institute, which has been named after him. From the institute he organized important scientific expeditions, which allowed a better knowledge about the health and life conditions in the interior of the country and contributed to the colonization of regions. Cruz eradicated urban yellow fever in the state of Pará. His sanitation campaign in the state of Amazonas allowed concluding the