The effect of NRI on emergent cases was most pronounced in communities with a high Social Vulnerability Index (SVI) . In these high-SVI zip codes, the incidence rate ratio was 1.30 roughly two weeks after exposure.
The findings suggest that while NRI districts often had lower average social vulnerability initially, the shift to in-person instruction was associated with increased community transmission, particularly in marginalized areas. Researchers conclude that instructional mode decisions have a measurable impact on community-wide health outcomes, rather than being confined strictly to the school environment. NRIzip
The study tracked the impact of in-person learning across various zip codes, revealing distinct trends: The effect of NRI on emergent cases was