Model-based assessment of SARS-CoV-2 Delta variant transmission dynamics within partially vaccinated K-12 school populations

We examined school reopening policies amidst ongoing transmission of the highly transmissible Delta variant, accounting for vaccination among individuals ≥12 years. We collected data on social contacts among school-aged children in the California Bay Area and developed an individual-based transmissi...

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Bibliographic Details
Published in:Lancet Regional Health - Americas (Online) 2022-01, Vol.5, p.100133-100133, Article 100133
Main Authors: Head, Jennifer R., Andrejko, Kristin L., Remais, Justin V.
Format: Article
Language:English
Subjects:
Alpha
COVID-19
Delta
masks
SARS-CoV-2
schools
transmission model
vaccination
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Summary:We examined school reopening policies amidst ongoing transmission of the highly transmissible Delta variant, accounting for vaccination among individuals ≥12 years. We collected data on social contacts among school-aged children in the California Bay Area and developed an individual-based transmission model to simulate transmission of the Delta variant of SARS-CoV-2 in schools. We evaluated the additional infections in students and teachers/staff resulting over a 128-day semester from in-school instruction compared to remote instruction when various NPIs (mask use, cohorts, and weekly testing of students/teachers) were implemented, across various community-wide vaccination coverages (50%, 60%, 70%), and student (≥12 years) and teacher/staff vaccination coverages (50% - 95%). At 70% vaccination coverage, universal masking reduced infections by >57% among students. Masking plus 70% vaccination coverage enabled achievement of
ISSN:2667-193X
2667-193X
DOI:10.1016/j.lana.2021.100133