Travel Norovirus, 118 cases of gastrointestinal illness reported at Grand Canyon, officials say June 24, 2022Wyatte Grantham-Philips, USA TODAYComments Off on Norovirus, 118 cases of gastrointestinal illness reported at Grand Canyon, officials say 118 casesĀ of gastrointestinal illness have been reported at the Grand Canyon since June 10, park officials said. Some tested positive for norovirus.