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High school wrestling: "A total of 54 (41.5%) of the 130 tournament attendees received testing, and 38 cases of SARS-CoV-2 infection were identified; the minimum attack rate was 30.2% (38 of 126), and 70.4% (38 of 54) of tests had a positive result." https://www.cdc.gov/mmwr/volumes/70/wr/mm7004e4.htm?s_cid=mm7004e4_w
"Among contacts of the 38 COVID-19 patients, 446 were determined by investigators to meet the CDC definition of a close contact, including 62 who were household contacts and 384 who were in-school contacts (classmates, teachers, noncompeting wrestling team members, & others...)"
"Among these 446 contacts, five had received a diagnosis of COVID-19 during June–November & were excluded from attack rate calculations. Among 95 (21.3%) contacts who received SARS-CoV-2 testing, 41 (43.2%) received a positive test result (minimum attack rate = 9.3% [41 of 441])"
"Among contacts, attack rates were highest among household members (30.0%) and wrestling team members who did not attend the tournament (20.3%), as were the percentages of positive test results (60.0% among household members and 54.2% among team members)."
This took place during high community transmission: "At the time of the tournament, the 14-day cumulative COVID-19 incidence in county A, home to seven of the 10 participating high school teams, was 363 per 100,000 persons; 7.7% of tests for SARS-CoV-2 had positive results (2)."
Very clear takeaway message here: "High-contact school athletic activities for which mask wearing and physical distancing are not possible should be postponed during periods with substantial or high levels of SARS-CoV-2 community transmission." Thanks @CroninChrysan for sharing!
