Oswaldo Cruz looking into a microscope, next to his son Bento and Burle de Figueiredo, at one of the laboratories at Manguinhos Castle, 1910 (Collection: Casa de Oswaldo Cruz)
Links[1] https://portal.fiocruz.br/sites/portal.fiocruz.br/files/audiovisualImagem/IOC%28OC%29%204-9-0.jpg