Posted by: Francis Koster Published: December 20, 2020

Things could go bad if we do not act to protect kid’s 2021 Summer School

Chances of catching Covid-19 are up to 18 times higher if you are exposed to someone who has it while you are indoors compared to being outdoors.[1] This is because the virus particles do not blow away like it would if you were both outside. If you are in a modern building with a new air conditioning system, the danger is less because it was designed bring in oxygen rich fresh air frequently. If you are unlucky enough to work in an old building, the virus concentration grows hourly as the infected folks near you continue to breathe it out.

This infection is spread by people who do not know they are infected and for a 10 day period unknowingly infect others until symptoms begin to show up. Every unknowing but infected person appears to infect one other person during that period.[2] On the single day of December 9, 2020, Covid-19 killed more than 3,157 Americans[3], and almost 300,000 newly infected were identified.[4]

More than half of all American K-12 schools (public and private) are 58 years old or older[5] and because of the kind of heating and cooling systems installed when they were built usually do not have the ability to bring in oxygen rich air, or discard classroom air containing the virus. This can be made worse by the addition of tiny particles of solid stuff like exhaust from copying machines and printers, or shop class dust, or lab experiments, which can act as very efficient delivery vehicles for the virus, and increase its spread.[6] Unless we do something, when schools re-start, more than half of the nation’s schools are highly likely to increase Covid-19 spreading among teachers, staff and students.[7],[8] Research also shows that student academic performance is reduced one or two letter grades when there is not adequate fresh air in a classroom, so kids in these older buildings suffer two blows to their future life success. [9],[10]

This entire school year has been impacted by school closings, schedule changes, and unfamiliar on-line classes. Student learning is estimated to be less than 70% of what would have been expected for school year 2020-21.[11]

Keeping kids out of school to prevent the spread of Covid-19 is driving our society crazy. Letting them (and their teachers) go back to old buildings that cannot bring in fresh air under today’s circumstance would be equally crazy. And vaccinations will not help us evade this awful choice – none is expected to be ready for children under 12 until summer of 2021, and vaccinating 53 million kids will take months longer.[12],[13],[14]

We should expect calls for a vastly expanded 2021 summer school to help the kids catch up.

In North Carolina, summer is when schools close their windows, and depend on their air conditioning for comfort. And if air conditioning systems in old buildings only lower temperature but do not bring in fresh air, we will have another national explosion of sickness.

The situation is worse than you think. Even if your school has modern air conditioning, there is little guarantee that it is working as designed. Inspections of schools in Raleigh, Rowan County, and Cabarrus County have all found modern school air conditioning systems that have had their fresh air intake reduced to lower energy costs. Even schools built with the capability to bring in fresh air using computerized timers have had this disabled by maintenance staff who are not comfortable or skilled when working with modern sophisticated computer driven systems.

As you probably know, the Captain of the Titanic ignored warnings of icebergs ahead, and killed 1,500 of the boat’s 2,240 passengers.[15] Our schools are occupied by one in five Americans every school day – and once full time school is back in session, half of those – the 30 million children or teachers who got to buildings 40 or 50 years old will re-enter Covid-19 hazardous buildings. These people are on the Titanic, and I am alerting you that an iceberg is 6 months away.

There are several steps that can be taken – some of them outside the box of routine school system thinking. First, schools could recruit skilled parents who work in air conditioning industries who could act as “first responders” for a volunteer work day to identify schools with inadequate fresh air. They could also make sure some windows can be opened and have screens so fresh air can be allowed in, or upgrade air filters. Third, school systems can hire outside air conditioning auditors to check everything out. Fourth, to get the kids out of old buildings with no ability to bring fresh air in, consider working out a short term lease with neighboring churches that have more modern Sunday School buildings that sit unused much of the time, or shopping centers with lots of now closed large stores, and use those for the summer. Fifth, as federal and state legislators design Covid relief packages, lobby them for money to upgrade the air conditioning systems in old school buildings, giving them and the people who occupy them a new lease on life.

As I write this, we are watching the epidemic explode, and vaccinations just beginning to trickle into the high risk population – not the kids, or their teachers. The immunity curves will cross sometime in the late spring or early summer for adults, but not until much later for children, because no vaccination for children is close to approval.

Unless concerned citizens step up to help our school systems out, we will hit this iceberg.

What are you going to do?


Authored by Francis Koster Ed. D.
Note to readers: We have received strong positive feedback about the value of the content of these emails. We would like to increase the number of screens they appear on. Not our strength, so if you have any thoughts about how to do that, please reach out to us at Also, please check out our second project, which loans pollution detection equipment to people interested in indoor environments in schools. We “Make the Invisible Visible”. We had to suspend that project due to the Covid-19 virus shutting schools down, but the intent does restart it someplace down the road. Please check out the information we gained in that effort thus far by clicking here:


[2] Personal communication, Dr. Jeffrey Shaman, Columbia University Epidemiologist, November 24, 2020
[5] (previous citations discussing indoor school environments posted by EPA have been removed from their website)
[9] pp7-9

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Francis P. Koster Ed.D.

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