Although this is from a paper published by a political advocacy group, it is logical and thorough.
I think it has a problem. Everyone agrees that children and people under 20 are at a low risk of getting a serious case, or dying. However, a S. Korean study showed that they are as likely as anyone to get the disease and become infectious. When that happens, they can infect other children, teachers, parents and grandparents. That is a serious problem. In Georgia at a YMCA summer camp there were 600 campers in late June. A COVID-19 infection spread rapidly through the camp. See:
https://www.webmd.com/lung/new…h-a-georgia-summer-camp#1
How COVID-19 Raced Through a Georgia Summer Camp
By E.J. Mundell
HealthDay Reporter
FRIDAY, July 31, 2020 (HealthDay News) -- With school reopenings just a few weeks away, a report on how the new coronavirus spread rapidly through a summer camp in Georgia suggests kids transmit the virus very well.
Nearly 600 young campers and counselors attended the camp in late June, and of the 344 who were tested for COVID-19, 76% tested positive by mid-July. Three-quarters of the COVID-19 cases for which information was available involved symptoms, including sore throat, headache and fever.
The camp opened for staff on June 17 and kids started arriving four days later. The first known case involved a teen camp staff member who developed chills on June 23 and tested positive for COVID-19 the next day.
After that, the camp was quickly disbanded and it closed on June 27.
Campers, who averaged 12 years of age, hadn't been required to wear masks although camp staff wore masks, the researchers said. . . .