How does this vary between different settings and scenarios?
The measures to use in an indoor space are very different from those which would be needed outside.
The best way to determine the right mix of control measures would be to consider the potential for exposure by the three main routes for each activity in that space. These routes are close contact between people through the air; more general exposure through the air; and contact through surfaces.
Several studies suggest that critical areas of transmission were linked to communal spaces that were outside of or away from the work task. (PROTECT COVID-19 National Core Study | Systematic review of risk factors for workplace outbreaks of COVID-19 – PROTECT COVID-19 National Core Study (manchester.ac.uk)) Controls including social bubbles are more difficult to implement and monitor in eating places, break rooms, washrooms, locker rooms, in-work transportation arrangements and shared accommodation.
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