Nearly 30 Massachusetts students must quarantine for 14 days after a fellow student went to school despite having tested positive for COVID-19.

The Attleboro High School student was tested for coronavirus on Wednesday, Sept. 9, and received a positive result on Friday, Attleboro Mayor Paul Heroux told HuffPost. The parents then sent the student to school on Monday.

Heroux said the student should have been kept isolated after the test date. The city’s contact tracing team identified the issue on Monday afternoon. When authorities contacted the family Tuesday morning, he said, the parents confirmed they were aware their child was infected but thought they could still go to school after quarantining for several days. He said that the student had posted about his diagnosis on Snapchat, prompting chatter on social media pages.

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[Source: Huffington Post]