The stomach bug, more formally known as norovirus, is highly contagious and can't be treated with antibiotics.

After 307 cases of gastro-intestinal illnesses were reported at evacuation centres between May 6 and June 1, health officials declared the outbreak over Monday.

A total of 105 people in the Edmonton Zone have shown symptoms of viral gastroenteritis since an outbreak of the viral stomach bug was discovered at the Northlands reception centre last weekend.