Flu season is at its peak, but another contagious virus, norovirus, has hit the area, and the county health departments are urging people to know the difference and take precautions against the illnesses.

Norovirus is a contagious virus, sometimes referred to as “stomach flu,” that causes inflammation of the stomach or intestines or both. Symptoms include stomach cramping, nausea, vomiting and diarrhea. Other symptoms include a low-grade fever, body aches and headache.

People affected by norovirus often feel very ill and easily can become dehydrated if they are not careful. Young children and older people are especially vulnerable to dehydration.