The announcement came just 11 days after the Democratic mayor said schools would shut down because of rising COVID-19 cases. And perhaps even two or three weeks down the line ... we may see a surge upon a surge,” he said. Other experts agreed that the coming weeks would be difficult, especially since so many traveled over the holiday and held in-person dinners indoors. Elementary school students attending in person will be required to undergo frequent testing for the virus. More than 9,300 residents have tested positive for the virus over the past seven days.