COVID-19 will be subject to stricter isolation rules in the event of virus outbreaks this fall.Dr. Kieran Moore says students who are fully vaccinated against the virus will have to take COVID-19 tests if they’re in contact with a high-risk person.Students who test negative can go back to school, but those who aren’t immunized will be off school for a minimum of 10 days while they wait for test results.Moore says unvaccinated students will have to take a second COVID test after about seven days, and they could be out of class for up to 20 days depending on the result.