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SARS-CoV-2 Transmission Dynamics in a Sleep-Away Camp
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4 2021
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Source: Pediatrics. 147(4)
[PDF-681.92 KB]
Details:
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Alternative Title:Pediatrics
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Description:Objective:
In late June 2020, a large outbreak of COVID-19 occurred at a sleep-away youth camp in Georgia affecting primarily persons ≤ 21 years. We conducted a retrospective cohort study among campers and staff (attendees) to determine the extent of the outbreak and assess factors contributing to transmission.
Methods:
Attendees were interviewed to ascertain demographic characteristics, known exposures to cases and community exposures, and mitigation measures before, during, and after attending camp. COVID-19 case status was determined for all camp attendees based on SARS-CoV-2 test results and reported symptoms. We calculated attack rates and instantaneous reproduction numbers, and sequenced SARS-CoV-2 viral genomes from the outbreak.
Results:
Among 627 attendees, median age was 15 years (interquartile range: 12–16 years); 56% (351/627) were female. The attack rate was 56% (351/627) among all attendees. Based on date of illness onset or first positive specimen collected, 12 cases were infected before arriving at camp, and 339 cases were camp-associated. Among 288 cases with available symptom information, 45 (16%) were asymptomatic. Despite cohorting, 50% of attendees reported direct contact with people outside their cabin cohort. On the first day of camp session, the instantaneous reproduction number was 10. Viral genomic diversity was low.
Conclusions:
Few introductions of SARS-CoV-2 into a youth congregate setting resulted in a large outbreak. Testing strategies should be combined with pre-arrival quarantine, routine symptom monitoring with appropriate isolation and quarantine, cohorting, social distancing, mask wearing, and enhanced disinfection and hand hygiene. Promotion of mitigation measures among younger populations is needed.
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Pubmed ID:33504612
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Pubmed Central ID:PMC8982574
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Volume:147
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Issue:4
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