There are
73.7 million children younger than 18 in the United States, accounting for 22.6 percent of the total population.
There have been
9.3 to 45 million cases of the flu each year since 2010 according to the CDC. The average is 27 million. 23% of these are typically children under 18 mirroring the U.S. population (60 million). The
2019/2020 flu season sickened 26 million people by February of this year.
Since 2004-2005, flu-related deaths in children reported to CDC during regular flu seasons have ranged from 37 to 188 deaths. 80% of these children were not vaccinated for the flu.
Let's take the high case for the seasonal flu
188 flu deaths / 60 million children = 0.000313% (IFR - Infection Fatality Rate).
However we are actually interested in the CFR (Case Fatality Rate) of the seasonal flu for children to make a proper comparison to this COVID study of school aged children. Or converting the COVID figures from the study to the projected IFR (Infection Fatality Rate) to make a comparison.
Based on COVID antibody tests the estimated number of COVID infections appears to be 10 times the number of tested cases. This would mean that the proper number of school children in the sample (including the cases) should be 277,285 + 2,772,850 = 3,050,135 projected COVID infections in school age children. This leads to a 0.00167% Infection Fatality Rate (IFR) for the COVID.
Seasonal Flu = 0.000313% (IFR )
COVID = 0.00167% (IFR)
So in summary it appears the COVID IFR for children is 5 times greater than for the seasonal flu.
Of course -- this is a rough calculation based on assumptions of the effective IFR. It should also be noted the flu data includes children under age 5 in the deaths which skews the data.
Bottom Line: The majority of the children who die of the flu (over 80%) do not take flu shots. Their parents can prevent many of these deaths simply by having their children vaccinated every season. COVID does not have a vaccine yet -- there is no protection against it medically -- therefore COVID is a risk with no medical prevention methods that can aid in making on-campus learning safe.