About 1,200 people working security at the Pyeongchang Olympics are being kept in their rooms while they're tested for norovirus.
Lee Hee-beom, chairman of the Pyeongchang Olympics organising committee, said today that they'll be sequestered until they're declared well.
He says results of tests on the workers will come out soon.
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Officials are examining food and water sources at a mountainside facility in Pyeongchang where the guards had been staying and also inspecting 18 other facilities that rely on groundwater.
Norovirus is a contagious virus that causes stomach pain, nausea and diarrhea. The most effective way to stop the spread is to practice good hand-washing and personal hygiene.
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