It brings the total suffering with the highly contagious virus to 86 with dozens of security guards at the Games affected.
Many have been taken to hospital suffering severe diarrhoea and vomiting following the breakout on Sunday.
Consequently, 1,200 guards have been withdrawn from the Olympic sites and quarantined in their rooms with organisers forced to call in 900 soldiers as cover.
It's the latest crisis to hit the Games, which officially gets under way with the opening ceremony on Friday.
There were already concerns about the severity of the cold currently freezing Pyeongchang.
Temperatures during the opening ceremony are expected to be -10C, while the wind chill during rehearsals plummeted to -23C.
Athletes are understandably concerned for their health, with British team bosses advising against attendance if due to compete within 48 hours of the three-hour ceremony.
The president of the organising committee of the Games, Lee Hee-beom, said: 'I heard some people aren't coming here because of the cold weather, but I want to tell you we've prepared thoroughly for that. Don't worry.'