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 C. Weaver; Sara Maknojia; Rafael R.G. Machado; Brooke M. Mitchell; Allan Mcconnell; Jacqueline E. Tate; Hannah L. Kirking

doi:10.1093/jpids/piac086

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 C. Weaver, Sara Maknojia, Rafael R.G. Machado, Brooke M. Mitchell, Allan Mcconnell, Jacqueline E. Tate, Hannah L. Kirking

SPPH Administration

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

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 language	English (US)
Pages (from-to)	550-556
Number of pages	7
Journal	Journal of the Pediatric Infectious Diseases Society
Volume	11
Issue number	12
DOIs	https://doi.org/10.1093/jpids/piac086
State	Published - Dec 1 2022

Keywords

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

ASJC Scopus subject areas

General Medicine

Access to Document

10.1093/jpids/piac086

Cite this

Baker, J. M., Shah, M. M., O'hegarty, M., Pomeroy, M., Keiser, P., Ren, P., Weaver, S. C., Maknojia, S., Machado, R. R. G., Mitchell, B. M., Mcconnell, A., Tate, J. E., & Kirking, H. L. (2022). 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, 11(12), 550-556. https://doi.org/10.1093/jpids/piac086

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 et al.
In: Journal of the Pediatric Infectious Diseases Society, Vol. 11, No. 12, 01.12.2022, p. 550-556.

Research output: Contribution to journal › Article › peer-review

Baker, JM, Shah, MM, O'hegarty, M, Pomeroy, M, Keiser, P, Ren, P , Weaver, SC, Maknojia, S, Machado, RRG, Mitchell, BM, Mcconnell, A, Tate, JE & Kirking, HL 2022, '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, vol. 11, no. 12, pp. 550-556. https://doi.org/10.1093/jpids/piac086

@article{4b6a14269a1d48d89633e05c71514e3a,

title = "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",

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.",

keywords = "COVID-19, SARS-CoV-2, household transmission, vaccination, youth",

author = "Baker, {Julia M.} and Shah, {Melisa M.} and Michelle O'hegarty and Mary Pomeroy and Philip Keiser and Ping Ren and Weaver, {Scott C.} and Sara Maknojia and Machado, {Rafael R.G.} and Mitchell, {Brooke M.} and Allan Mcconnell and Tate, {Jacqueline E.} and Kirking, {Hannah L.}",

note = "Publisher Copyright: {\textcopyright} 2022 Published by Oxford University Press on behalf of The Journal of the Pediatric Infectious Diseases Society.",

year = "2022",

month = dec,

day = "1",

doi = "10.1093/jpids/piac086",

language = "English (US)",

volume = "11",

pages = "550--556",

journal = "Journal of the Pediatric Infectious Diseases Society",

issn = "2048-7193",

publisher = "Oxford University Press",

number = "12",

}

TY - JOUR

T1 - 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

AU - Baker, Julia M.

AU - Shah, Melisa M.

AU - O'hegarty, Michelle

AU - Pomeroy, Mary

AU - Keiser, Philip

AU - Ren, Ping

AU - Weaver, Scott C.

AU - Maknojia, Sara

AU - Machado, Rafael R.G.

AU - Mitchell, Brooke M.

AU - Mcconnell, Allan

AU - Tate, Jacqueline E.

AU - Kirking, Hannah L.

PY - 2022/12/1

Y1 - 2022/12/1

N2 - 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.

AB - 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.

KW - COVID-19

KW - SARS-CoV-2

KW - household transmission

KW - vaccination

KW - youth

UR - http://www.scopus.com/inward/record.url?scp=85144638558&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85144638558&partnerID=8YFLogxK

U2 - 10.1093/jpids/piac086

DO - 10.1093/jpids/piac086

M3 - Article

C2 - 36043454

AN - SCOPUS:85144638558

SN - 2048-7193

VL - 11

SP - 550

EP - 556

JO - Journal of the Pediatric Infectious Diseases Society

JF - Journal of the Pediatric Infectious Diseases Society

IS - 12

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this