By Jacqueline Howard and Michal Ruprecht, CNN
(CNN) — Some Winter Olympics athletes are falling ill with norovirus, and Team USA says it’s staying “dialed in” to curb the spread of the common stomach bug.
The US Olympic and Paralympic Committee is continuing measures to protect athletes from infections like norovirus, says Carrie Aprik, winter sports dietitian for the committee.
“These cases are a good reminder for us to stay dialed in our hygiene strategies — most importantly, frequent handwashing,” Aprik said in an email Tuesday. “We also encourage our whole delegation to stay in close contact with the medical staff as soon as any symptoms arise.”
Cases of norovirus were identified among Team Finland, the International Olympic Committee said last week, postponing a women’s ice hockey game with Canada. The game will now be played Thursday.
The decision to postpone the game was made “collectively and in accordance with established health and safety principles,” the IOC said.
The virus has also been identified in one member of Team Switzerland. The US Centers for Disease Control and Prevention defines a norovirus outbreak as “two or more similar illnesses resulting from a common exposure,” but IOC officials have declined to call these cases an outbreak.
Norovirus is the leading infectious cause of vomiting and diarrhea in the world. It spreads easily among people, especially on cruise ships and in other places where people live in close proximity.
It’s also been identified at previous Winter Olympics. At the 2018 Games in South Korea, for instance, officials scrambled to contain the same virus.
“Illness mitigation is always top of mind,” Aprik wrote, adding that measures to reduce spread include disinfecting surfaces, frequent handwashing, avoiding sharing personal items like water bottles and following food safety practices.
The virus has the potential to cause large outbreaks, said Dr. Dan Barouch, director of the Center for Virology and Vaccine Research at Beth Israel Deaconess Medical Center in Boston, who is not involved in the Winter Olympic Games.
“The concern for the Olympics is that we hope to prevent a large number of people coming down with norovirus to avoid a disruption in competition. Ways to do that would be to isolate people who do have the disease and to quarantine people who’ve been exposed, and also to ensure there is good hand hygiene,” Barouch said.
The “main risk,” he added, is that this virus is highly contagious and there tend to be more cases during this time of year.
“Whether that’s because people spend more time indoors or in closed settings, we’re not sure, but cases do go up in the wintertime,” Barouch said.
When someone is exposed to norovirus, they usually develop symptoms quickly, within 12 to 48 hours, and the most common symptoms include diarrhea, vomiting, nausea and stomach pain.
“The good news is that most people recover from it very quickly, too,” Barouch said.
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