The way I'm reading it from other articles is honestly it sounds like they may have been awaiting a test result? And the District is sorta making that statement in a round about way.
From another article: "A Greenfield Central Junior High School student has tested positive for the coronavirus after the first day of class, according to an email sent to families Thursday evening. The student attended part of the first day of classes, which began Thursday for Greenfield-Central Community Schools. The district told families that its "Positive COVID-19 Test Protocol" was enacted as soon the school was alerted by the Hancock County Health Department about the positive test. The student was immediately isolated and all close contacts were determined. It's unclear when the student was tested, but getting results typically takes days, indicating the student was tested prior to the first day of school."
"The Indiana Department of Education's guidance to school districts says if students or staff have "someone in their home being tested for COVID-19," the district can exclude that person from school and recommend they quarantine for 14 days. Aspy (Hancock County Health Department Officer) said anyone awaiting results should remain in isolation until results are received. But the Greenfield district's plan for reopening schools does not offer specific guidance on what students or staff should do if they have a pending test."
https://www.indystar.com/story/news...positive-covid-19-first-day-class/5552735002/
So really this was a case where medical advice-wise that student should NOT have been in class that day NOT that we have issues with spread in school....at least in that case.