Olympic organizers have promised to introduce viral testing in the polluted waters in Rio de Janeiro where about 1,400 athletes will compete in next year's games.

The IOC and Brazilian organizers have repeatedly insisted that only bacterial testing was required despite an independent five-month analysis by The Associated Press showing dangerously high levels of viruses from human sewage at all Rio Olympic water venues

But local organizing committee head Carlos Arthur Nuzman told the AP on Tuesday that "the viral tests, we will do and we will repeat this because the most important (thing) for us is the health of the athletes."

Nuzman says organizers are working "on a daily basis to create the test" but gave no indication when it would be ready.