Hosted the sailing and windsurfing events for the Summer Olympics 2016. Ahead of the games, the organizers committed to cleaning up Rio’s heavily polluted waterways with a plan that would reduce pollution by at least 80%, this goal has been pushed back to 2035.  Only half of Rio’s sewage gets treated, and most of this untreated waste ends up in Guatana Bay, which connects to Marina de Gloria. 8,200 liters per second of sewage, as well as 100 tons of garbage each day run into the bay ⁽¹⁰⁾. While locals rarely contract infection from her home waters, sailors from elsewhere, without immunity built up over years, often fall sick. The waters contain dangerously high levels of virus and bacteria. A biologist and professor at the Central university of Rio bluntly advised all athletes to receive vaccinations for Hepatitis A before competitions ⁽⁵⁾.