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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.
Baker, Julia M; Shah, Melisa M; O'Hegarty, Michelle; Pomeroy, Mary; Keiser, Philip; Ren, Ping; Weaver, Scott C; Maknojia, Sara; Machado, Rafael R G; Mitchell, Brooke M; McConnell, Allan; Tate, Jacqueline E; Kirking, Hannah L.
  • Baker JM; CDC COVID-19 Response Team, Atlanta, GA, USA.
  • Shah MM; Epidemic Intelligence Service, CDC, Atlanta, GA, USA.
  • O'Hegarty M; CDC COVID-19 Response Team, Atlanta, GA, USA.
  • Pomeroy M; Epidemic Intelligence Service, CDC, Atlanta, GA, USA.
  • Keiser P; CDC COVID-19 Response Team, Atlanta, GA, USA.
  • Ren P; CDC COVID-19 Response Team, Atlanta, GA, USA.
  • Weaver SC; Galveston County Health District, Galveston, TX, USA.
  • Maknojia S; Department of Internal Medicine, University of Texas Medical Branch at Galveston, Galveston, TX, USA.
  • Machado RRG; Department of Pathology, University of Texas Medical Branch at Galveston, TX, USA.
  • Mitchell BM; World Reference Center for Emerging Viruses and Arboviruses and Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX, USA.
  • McConnell A; Galveston County Health District, Galveston, TX, USA.
  • Tate JE; World Reference Center for Emerging Viruses and Arboviruses and Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX, USA.
  • Kirking HL; World Reference Center for Emerging Viruses and Arboviruses and Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX, USA.
J Pediatric Infect Dis Soc ; 2022 Aug 31.
Article in English | MEDLINE | ID: covidwho-2017999
ABSTRACT
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.
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Full text: Available Collection: International databases Database: MEDLINE Topics: Vaccines / Variants Language: English Year: 2022 Document Type: Article Affiliation country: Jpids

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Full text: Available Collection: International databases Database: MEDLINE Topics: Vaccines / Variants Language: English Year: 2022 Document Type: Article Affiliation country: Jpids