Regardless of the instructional mode, weekly incidence in all surveyed zip codes typically increased starting in August, peaked in late fall (November/December), and then declined. Implications for Policy
Zip codes within NRI districts showed a significantly higher cumulative incidence of COVID-19 compared to those offering only Remote Instruction (RI). The risk ratio was found to be 1.12 , representing an additional 519 cases per 100,000 residents .
In the context of public health research, (or "NRI zip codes") refers to zip codes associated with school districts that implemented Non-Remote Instruction (NRI) during the COVID-19 pandemic.