NEED TO KNOW

Roberts Elementary School in Medford, Mass., remains closed after more than 130 students and staff members were sickened with what officials believe is norovirus

Health officials examined the school's kitchen and do not believe it is the source of the outbreak

A professional company was brought in to deep-clean the school

A school in Massachusetts remains closed for deep cleaning after an outbreak of the virulent norovirus infection has sickened more than 130 students and staff members.

Roberts Elementary School in Medford originally announced the closure on Dec. 10, explaining that “there were over 130 student absences at the Roberts today, with further students and staff reporting at school today feeling symptoms of an upset stomach.”

"We believe the cause of this

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