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SARS-CoV-2 transmission model suggests primary school infection could be greater this autumn than in 2020

Press release issued: 13 September 2021

The SARS-CoV-2 epidemic has already had a major impact on children's education, with schools having been required to implement infection control measures that have led to long periods of absence and classroom closures. With the new school year underway, risk modelling specialists at the University of Bristol have developed a new epidemiological model for SARS-CoV-2 transmission that forecasts primary school infection outbreaks could be more frequent and possibly substantially larger this autumn than in 2020, due to the more transmissive and infectious Delta variant and projected increase in community infection.

The study, published on the preprint server medRxiv, is led by Dr Mark Woodhouse from Bristol's Schools of Earth Sciences and Mathematics, working with colleagues in Earth Sciences, Bristol Veterinary School and with specialists in public health and infectious diseases on the CoMMinS (COVID-19 Mapping and Mitigation in Schools) project.

The new agent-based model characterises the numbers of daily close contacts that can occur in primary school classrooms, involving pupils and teachers and provides a basis for assessing likely rates of COVID-19 infection transmission and infections within classrooms in the new term.  The model takes into account the infection dynamics of the new Delta variant of SARS-CoV-2 and changing guidance for mitigation measures in schools.

The pre-print reports advances in computational probabilistic modelling for estimating in-school infection risks, building on earlier studies by Bristol colleagues (Sparks et al; Aspinall et al).  The new analytical framework is based on developments in characterising, statistically, the complexities of child-with-child and child-with-teacher interactions within the classroom, and how these are modulated by classroom management controls for reducing infection spread.

Read the full University of Bristol press release

Further information

Paper: 'Analysis of alternative Covid-19 mitigation measures in school classrooms: an agent-based model of SARS-CoV-2 transmission' by Mark Woodhouse, Willy Aspinall and Stephen Sparks with the Bristol University CoMMinS Project in medRxiv

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