Shenandoah National Park Warns Hikers of Contagious Virus
LURAY, Va. — An illness affecting hikers has been reported on the Appalachian Trail.
According to a June 17, 2026 Shenandoah National Park social media announcement, the highly-contagious norovirus is the suspected cause.
The Center for Disease Control and Prevention website notes that norovirus illness symptoms include vomiting, diarrhea, fever and body aches.
It is sometimes called the “stomach flu” or the “stomach bug.” However, norovirus illness is not related to the flu. The flu is caused by the influenza virus. Norovirus causes acute gastroenteritis — an inflammation of the stomach or intestines.
Most people affected by the illness feel better within one to three days; but they can still spread the virus for a few days after recovery.
Shenandoah National Park officials released the following recommendations to help keep visitors safe on the trail and throughout the park:
Treat all water
Boil water for at least one minute to kill germs.
Do not share items
Avoid sharing food, water or personal items, as norovirus can spread on surfaces.
Dispose of waste properly
Bury waste at least eight inches deep and 200 feet away from water sources, campsites and trails. Wipe down privy handles, bear boxes and other surfaces before use.
Wash hands with soap
Scrub hands with soap and water for at least 20 seconds. Hand sanitizer is not effective against norovirus.
Avoid other hikers
Keep away from others while sick and for two to three days after symptoms end. Tent alone when possible, and secure single rooms at hostels or hotels.
Seek medical treatment
Get medical help if you become severely dehydrated or if symptoms last for more than a few days.
For questions or to report illness, please email publichealthprogram@nps.gov.