PYEONGCHANG, South Korea — Two Swiss athletes are the first at the Winter Olympics confirmed to have contracted norovirus, which has affected hundreds of people in Pyeongchang.

The Swiss Olympic delegation said in a statement on Friday that the two athletes had shown signs of the highly contagious virus “in the past several days,” and that they no longer had symptoms after receiving care. It said they were sequestered in private rooms and were not staying at the Olympic Village.

The statement did not identify the athletes or their sport, but it said they were staying in a location close to where freestyle skiing events were being held.

It was not immediately clear whether the athletes would compete. But the statement said, “We would like to point out that athletes affected by norovirus will be admitted to the competitions in good physical condition and after examination by a Swiss team doctor,” adding that “it is also not out of the question that the athletes are competitive after surviving the disease.”