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A central response to the COVID-19 pandemic was to create NHS capacity in part by suspension of elective services, as has been described elsewhere [1]. Now that the pandemic's peak appears to have passed, attention has focused on restoring these services. Common to most hospital plans is the separation of patient pathways into COVID-19 test-positive (red) and test-negative (green) cohorts; patients in the latter also as a precaution having been in isolation for 14 days.

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Journal article



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Covid-19, modelling, risk, safety