Days before the Pyeongchang Winter Olympics are to begin, organizers are already apologizing, though there's no wolf wandering the Olympic village this time. Rather, an outbreak of norovirus, which causes vomiting and diarrhea, has hit at least 41 of 1,200 private security guards, reports the BBC. Those affected so far were staying in the same building, but all guards are being sequestered to prevent the spread of the highly contagious virus, per CNN and NBC News. Meanwhile, 900 soldiers have been brought in and "will be responsible for security checks of the 20 venues … until the patients' condition is normalized," officials say. They add that food and water sources are being examined as accommodations are disinfected. (More Olympics stories.)