Free Online HD YesMovies. The Oswaldo Cruz Institute, in Rio de Janeiro, serves as a major research center in the field of public health. Aerial shots depict vast green areas and rural regions with small farms, reservoirs, and riverside lands. The work of health agents is shown at a small remote outpost, along with the facility’s infrastructure and tools used to study endemic diseases. The film also records various landscapes, such as dirt roads cutting through the caatinga, as well as rapids and waterfalls.