Figures released by local organizers showed 11 positive tests for COVID-19 among 379 athletes and officials arriving Monday. They have been taken into isolation hotels to limit the spread of the infection and could miss their events.

The positive test rate of 2.9% for athletes and officials compared to 0.66% for Olympic “stakeholders,” a group which includes workers and media, in the same period. There were 1,059 people in that category.

Over a three-day period from Saturday through Monday, the positivity rate for athletes and officials was 40% higher than other Olympic arrivals.