Are campers getting norovirus in the Grand Canyon?

The virus was confirmed to have sickened people on at least eight river rafting trips in the national park between April and May 2022. Some campers who did not go rafting also reported getting sick with nausea, stomach cramping, vomiting, or diarrhea.



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Baird said some visitors have tested positive for norovirus. Norovirus, which can be spread through infected people and contaminated food and water or by touching contaminated surfaces, causes “sudden-onset vomiting and diarrhea” that lasts one to three days, the park said.

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A large norovirus-associated outbreak of acute gastroenteritis occurred in the Grand Canyon backcountry among river rafters and backpackers during April–June 2022. Preliminary analyses of illness characteristics and portable toilet specimen test results suggested norovirus as the primary causative agent of illness.

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