A fogger is any device that creates "fog", or very fine mist, from a liquid. They are typically filled with disinfectants.There is no evidence that foggers are useful in a room with people present, and they may cause harm.Fogging devices may have some use for cleaning...
They are more effective in rooms where the ventilation rate is lower than desired and/or is difficult to provide ventilation consistently. This can include rooms that rely on opening windows for ventilation.There are a range of different options, including portable...
HEPA filter-based air cleaners are likely to be beneficial for reducing transmission risk.There is growing evidence that air cleaners based on HEPA filters can be effective at reducing the number of small particles in the air. (Removal of Airborne Severe Acute...
Although there are no “safe” levels for occupancy of a room, you can judge the appropriate number of people for a space can be made based on the type and size of space, the activity, the duration of time spent there, and the ventilation.The following rules of thumb...
Managing the number of people in a building or room can have a significant effect on the risk of transmission.Reducing the number of people has three effects - it reduces the chance than an infectious person is present, it reduces the number of people who can be...
Ventilation is likely to be more important than distancing when people are more than 1m apart and share a room for longer periods of time.There is likely to be a reduction in exposure beyond 2-3m as some of the particles start to settle out of the air. (Visualising...
Reducing close face-to-face interactions can reduce risks, but there is no “safe” distance in most indoor environments which will eliminate the risk altogether. Evidence suggests that respiratory particles that carry virus can easily be carried in the air over 2m....
‘COVID behaviour fatigue’ can affect messaging and communication.Evidence suggests that behaviour fatigue was a reason support for mitigation measures slipped for both workers and passengers. In addition was the influence of risk habituation (increased acceptance of...
Messages and communications are most effective at increasing or maintaining support when they are clear and consistent. Evidence for this comes from research in multiple industries. Frequent changes to rules or differences in rules across various settings and regions...
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....
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