The National Park Service is investigating a medical mystery after multiple people returning from river rafting trips in the Grand Canyon reported an unknown illness with flu-like symptoms that won’t go away. NBC News’ Morgan Chesky explains. The National Park Service is investigating a medical mystery after multiple people returning from river rafting trips in the Grand Canyon reported an unknown illness with flu-like symptoms that won’t go away. NBC News’ Morgan Chesky explains.
Grand Canyon rafters report mystery illnesses on social mediaGrand Canyon rafters report mystery illnesses on social media
