Maple Ridge, Canada

In this Oct. 24, 2015, file photo, people dine outside the Ahwahnee hotel in Yosemite National Park, Calif. Yosemite National Park is investigating about 170 reports of gastrointestinal illnesses and has confirmed two cases of norovirus, officials said Thursday, Jan. 16, 2020. The National Park Service began investigating after visitors and employees started reporting illnesses this month. (AP Photo/Ben Margot, File) At a Glance Two cases were confirmed to be norovirus.The majority of the cases happened the first week in...