In Pacifica, Calif., a norovirus outbreak has sickened more than a hundred students. San Mateo County Health officials confirmed with ABC News that they have a lab-confirmed outbreak of norovirus and school officials are working to stop it in its tracks.

The virus that first appeared in early May has already affected at least 105 students. These students are experiencing flu-like symptoms, ranging from diarrhea to stomach cramps.

Since then, school officials have worked feverishly to rid all surfaces of the virus, giving everything a thorough scrub-down. A school-wide cleaning includes swabbing down desk tops, chairs and anything that is commonly used by multiple children. Teachers and staff also began encouraging students to wash their hands whenever they touched anything that might be contaminated with germs.

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