Osceola County school officials said four teachers have tested positive for COVID-19 and five others are in quarantine awaiting test results.
All the teachers work at Harmony Middle School, officials said.
None of the teachers who have been confirmed positive have been on campus since the start of the school year, officials said.
Officials said the four teachers who tested positive came from pre-planning exposure to coronavirus.
Schools reopened in Osceola County on Monday.
Officials said the school district is not aware of exposure to any students.