Health officials confirm more than 300 students and staff are sick after an apparent norovirus outbreak at Delta Secondary School.

The Fraser Health Authority said the high school is undergoing enhanced cleaning and there is no indication the outbreak has spread to any other schools.

The infections appear to be norovirus but Fraser Health is still confirming that suspicion. In the meantime, students and staff who are experiencing symptoms of vomiting or diarrhea are asked to stay home.

Norovirus is highly contagious and can be spread through direct contact, such as sharing food or eating utensils, or by touching contaminated surfaces such as door handles.

Infection can be curbed by washing hands with soap and water regularly and by politely sneezing and coughing into your elbow.

The symptoms usually pass after 24 to 48 hours in otherwise healthy sufferers.

For more information on norovirus, visit the Fraser Health Authority website.