Canada –
“In December 2024, 4 youth ice hockey teams attended a weekend tournament in a rural Alberta arena. Because of cold weather and back-to-back games, the players and families spent most of the day inside the arena and ate lunch in the dressing rooms. During an afternoon game, players began to report headaches, fatigue, dizziness, nausea, and vomiting. The symptoms were thought to be related to a virus circulating in the community; families left the arena and headed home…”
https://www.cmaj.ca/content/198/30/E1191.full