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

Julia M. Baker, Melisa M. Shah, Michelle O'Hegarty, Mary Pomeroy, Philip Keiser, Ping Ren, Scott Weaver, Sara Maknojia, Rafael R.G. Machado, Brooke M. Mitchell, Allan McConnell, Jacqueline E. Tate, Hannah L. Kirking

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)550-556
Number of pages7
JournalJournal of the Pediatric Infectious Diseases Society
Volume11
Issue number12
DOIs
StatePublished - Dec 28 2022

Keywords

  • COVID-19
  • household transmission
  • SARS-CoV-2
  • vaccination
  • youth

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Infectious Diseases

Fingerprint

Dive into the research topics of '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'. Together they form a unique fingerprint.

Cite this