The Oswaldo Cruz Foundation (Fundação Oswaldo Cruz, or Fiocruz) is a leading Brazilian public health and research institution based in Rio de Janeiro. Established in 1900, it focuses on biomedical research, healthcare, disease prevention, and public health policy. Fiocruz conducts advanced research in infectious diseases, vaccines, epidemiology, and environmental health, while also offering education and training programs for health professionals. The foundation collaborates with national and international organizations, contributing to scientific innovation, public health initiatives, and the development of healthcare solutions in Brazil and globally.