If rotavirus symptoms do occur, the illness can begin suddenly. Common symptoms of rotavirus in adults include: Vomiting. Upset stomach. Fever. Watery diarrhea. Loss of appetite. Mucus in stool.
Symptoms of rotavirus infection are the same for adults and for children, but adults tend to have milder versions. Symptoms include: Stomach pain, cramping, and discomfort. Low-grade fever, and, rarely, a high fever of degrees or above. Vomiting. Diarrhea. Fatigue. Loss of appetite.