I just posted this on another thread, and some of you are on that one as well. But for those who are not, this is relevant to the issue of schools opening or staying closed:
New information from the CDC–Here is the report–July 31 (last Friday).
SARS-CoV-2 Transmission and Infection Among Attendees of an Overnight Camp — Georgia, June 2020 | MMWR
bottom line: 363 campers, median age 12, actual ages ranged from 6-19 in Georgia at the end of June.
Of those 6-10 years old, 51% tested positive. This contradicts earlier studies that said 6-10 year olds got the virus and transmitted the virus less than older people. 36 of of all those (not just the children, everyone) who tested positive had no symptoms.
There was an article in the Wash. Post about it today.
https://www.washingtonpost.com/health/2020/07/31/georgia-children-covid-outbreak/
Here are the highlights:
June 17-20–orientation for 138 trainees & 120 staff members
June 21-27–120 staff members joined by 363 campers and 3 more senior staff
All of them had to provide proof of a negative covid-19 test taken less than 12 days before arriving. Only staff wore masks. They did not open windows and doors. There was daily singing and cheering.
June 23 (two days after opening the camp) a staffer left with chills. The next day another staffer tested positive.
June 24–campers sent home
June 27–camp closed
Georgia Dept. of Health followed up.
Code:
Total of 597 Georgia residents were at the camp (they didn't track non-Ga. residents)
Camper age: 6-19, median age = 12
staff/trainee ages: 14-59, median age =17
344 were tested; 260 of them (76%) tested positive; 42% of the total number at the camp were positive
51% of those 6-10 tested positive
36 who tested positive showed no symptoms
not clear if some were infected before attending the camp
since not all the campers/staff were tested, the positives were probably an underestimate
And of course we still have no way to tell who infected whom–just circumstantial evidence that person A got symptoms before person B, but since symptoms appear at different rates in different people, that’s just a rough guess.