The authors of the CDC report suggested that while schools in affluent areas may already have had resources to upgrade their systems, schools in high-poverty areas may have more experience in accessing and using federal funds for such. purposes.
35% to 44% of schools in poorer communities reported using HEPA filtration systems in spaces where children eat and in classrooms and high-risk areas, and 36% to 50% of schools they serve communities with low levels of poverty have reported using HEPA filters in those areas.
In contrast, only one in four or five schools serving communities with medium poverty levels reported using HEPA filters in those places.
The study was based on results from a nationally representative sample of 420 K-12 public schools, using data collected between February 14 and March 27 by the National School Covid-19 Prevention Study. The sampling framework consists of public schools in all 50 states and the District of Columbia; it is a web-based survey distributed to school administrators.