Signs and symptoms of norovirus infection may start suddenly and include:  Nausea Vomiting Stomach pain or cramps Watery or loose diarrhea Feeling ill Low-grade fever Muscle pain  Signs and symptoms usually begin 12 to 48 hours after your first exposure to a norovirus and last 1 to 3 days. You can continue to shed virus in your stool for several weeks after recovery. This shedding can last weeks to months if you have another medical condition. Some people with norovirus infection may show no signs or symptoms. However, they're still contagious and can spread the virus to others.
signs symptoms norovirus infection may start suddenly include:  nausea vomiting stomach pain cramps watery loose diarrhea feeling ill low-grade fever muscle pain  signs symptoms begin 12 48 hours first exposure norovirus last 1 3 days  can continue shed virus stool weeks recovery  shedding can last weeks months medical condition  people norovirus infection may show signs symptoms  however  they're still contagious can spread virus others
norovirus