Supplementary material from "School closures reduced social mixing of children during COVID-19 with implications for transmission risk and school reopening policies"
Posted on 2021-04-05 - 09:24
School closures may reduce the size of social networks among children, potentially limiting infectious disease transmission. To estimate the impact of K-12 closures and reopening policies on children's social interactions and COVID-19 incidence in California's Bay Area, we collected data on children's social contacts and assessed implications for transmission using an individual-based model. Elementary and Hispanic children had more contacts during closures than high school and non-Hispanic children, respectively. We estimated that spring 2020 closures of elementary schools averted 2167 cases in the Bay Area (95% CI: −985, 5572), fewer than middle (5884; 95% CI: 1478, 11.550), high school (8650; 95% CI: 3054, 15 940) and workplace (15 813; 95% CI: 9963, 22 617) closures. Under assumptions of moderate community transmission, we estimated that reopening for a four-month semester without any precautions will increase symptomatic illness among high school teachers (an additional 40.7% expected to experience symptomatic infection, 95% CI: 1.9, 61.1), middle school teachers (37.2%, 95% CI: 4.6, 58.1) and elementary school teachers (4.1%, 95% CI: −1.7, 12.0). However, we found that reopening policies for elementary schools that combine universal masking with classroom cohorts could result in few within-school transmissions, while high schools may require masking plus a staggered hybrid schedule. Stronger community interventions (e.g. remote work, social distancing) decreased the risk of within-school transmission across all measures studied, with the influence of community transmission minimized as the effectiveness of the within-school measures increased.
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Head, Jennifer R.; Andrejko, Kristin L.; Cheng, Qu; Collender, Philip A.; Phillips, Sophie; Boser, Anna; et al. (2021). Supplementary material from "School closures reduced social mixing of children during COVID-19 with implications for transmission risk and school reopening policies". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.5365212.v1
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AUTHORS (14)
JH
Jennifer R. Head
KA
Kristin L. Andrejko
QC
Qu Cheng
PC
Philip A. Collender
SP
Sophie Phillips
AB
Anna Boser
AH
Alexandra K. Heaney
CH
Christopher M. Hoover
SW
Sean L. Wu
GN
Graham R. Northrup
KC
Karen Click
NB
Naomi S. Bardach
JL
Joseph A. Lewnard
JR
Justin V. Remais