Nassau County Executive Laura Curran says that closing schools down due to an increase in COVID-19 cases will be a last resort, but it is up to each district to decide what is best.

"We do have 56 independent school districts, and they all need to decide what is best for them. If some districts decide to go remote for a few weeks, I am confident that our children will continue to receive high quality education and the support resources they deserve," says Curran.

Curran also says they are finding that most new cases are not coming from classrooms, restaurants, bowling alleys or gyms.

Curran says infections are mainly coming from weddings, sweet sixteens, off campus parties and other large get-togethers.

Health officials say schools reopening have been a great success overall.

"99% of in person school days have occurred. We've been able to bring that back. Children have safely been able to go to school," says Nassau Health Commissioner Dr. Lawrence Eisenstein.

Both Curran and Suffolk Executive Steve Bellone have said they "strongly disagree" with New York City Mayor Bill De Blasio's decision to shut city schools down, effective Thursday.

The county says it has administered more than 10,000 COVID-19 tests a day.

The positivity rate in Nassau on Tuesday was 3.5%. Nassau also reported 147 people were hospitalized for COVID-19, 26 were in the ICU and 15 on ventilators. Curran says this is the highest numbers have been since the county began reopening in May.

Curran said schools would close on a regionwide level if the positivity rate went about 9% on a seven-day average.

Some districts have made moves to go remote -- Nassau BOCES will be remote starting the week after Thanksgiving to avoid any issues related to travel and Oysterponds Union Free School District will be remote through the new year.