Another problem has been discovered ahead of the Olympic games in Rio.
Scientists said they've found a "super bacteria" at the city's beaches, which is resistant to drugs.
The bacteria was apparently in sewage discharged by local hospitals.
Two of the affected beaches are supposed to host the Olympic sailing competitions.
Scientists said that the bacteria can cause severe skin infections.
However, organizers said that at this time, there is no plan to move the sailing venues to another location because they have already met the health standards of the World Health Organization.
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