Air filtration calculation from Professor David Pui at the University of Minnesota
School IAQ ventilation fact sheets from US Green Building Council
ASHRAE Covid ventilation website - American Society of Heating Refrigeration and Air-conditioning Enginers
The following websites are useful for making public health decisions with respect to the risk of covid infections.
Minnesota Covid Waste water dashboard
APMresearchlab Covid in Minnesota
For advice on where we go from here please see the March 1, 2022 report on the Getting to and Sustaining the Next Normal: A Roadmap for Living with COVID The authors suggest that we will reach the point where COVID becomes like the seasonal flu when daily death rates average 165/day.
As of March 8, 2022, the daily death rate averaged over seven days in the US was 1,414/day. Update information is available from the NY Times COVID in the US
