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Primary and Secondary Attack Rates by Vaccination Status after a SARS-CoV-2 B.1.617.2 (Delta) Variant Outbreak at a Youth Summer Camp-Texas, June 2021.
Journal of the Pediatric Infectious Diseases Society ( IF 3.2 ) Pub Date : 2022-12-28 , DOI: 10.1093/jpids/piac086
Julia M Baker 1, 2 , Melisa M Shah 1, 2 , Michelle O'Hegarty 1 , Mary Pomeroy 1 , Philip Keiser 3, 4 , Ping Ren 5 , Scott C Weaver 6 , Sara Maknojia 3 , Rafael R G Machado 6 , Brooke M Mitchell 6 , Allan McConnell 6 , Jacqueline E Tate 1 , Hannah L Kirking 1
Affiliation  

Children are capable of initiating COVID-19 transmission into households, but many questions remain about the impact of vaccination on transmission. Data from a COVID-19 Delta variant outbreak at an overnight camp in Texas during June 23-27, 2021, were analyzed. The camp had 451 attendees, including 364 youths aged  < 18 years and 87 adults. Detailed interviews were conducted with 92 (20.4%) of consenting attendees and 117 household members of interviewed attendees with COVID-19. Among 450 attendees with known case status, the attack rate was 41%, including 42% among youths; attack rates were lower among vaccinated (13%) than among unvaccinated youths (48%). The secondary attack rate was 51% among 115 household contacts of 55 interviewed index patients. Secondary infections occurred in 67% of unvaccinated household members and 33% of fully or partially vaccinated household members. Analyses suggested that household member vaccination and camp attendee masking at home protected against household transmission.

中文翻译:

2021 年 6 月在得克萨斯州青年夏令营爆发 SARS-CoV-2 B.1.617.2(Delta)变体后按疫苗接种状态划分的初级和次级攻击率。

儿童能够将 COVID-19 传播到家庭中,但关于疫苗接种对传播的影响仍有许多问题。分析了 2021 年 6 月 23 日至 27 日在德克萨斯州一个过夜营地爆发的 COVID-19 Delta 变种病毒的数据。该营有 451 名参加者,包括 364 名 18 岁以下的青少年和 87 名成年人。对 92 名 (20.4%) 同意的与会者和 117 名 COVID-19 受访者的家庭成员进行了详细访谈。在已知病例的450名与会者中,发病率为41%,其中青少年发病率为42%;接种疫苗的青少年 (13%) 的发病率低于未接种疫苗的青少年 (48%)。55 名受访指标患者的 115 名家庭接触者的二次发病率为 51%。67% 未接种疫苗的家庭成员和 33% 完全或部分接种疫苗的家庭成员发生继发感染。分析表明,家庭成员接种疫苗和营地参加者在家中戴口罩可以防止家庭传播。
更新日期:2022-08-31
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