• 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
• Screens or partitions are only likely to be beneficial for reducing risk during short face-to-face interactio
• HEPA filter-based air cleaners are likely to be beneficial for reducing transmission risk 
• Air cleaning devices based on UV-C technologies are likely to be beneficial for reducing transmission risk 
• Transmission via surfaces is possible but it is likely to account for a relatively small proportion of transmission for Covid-19 
• Mechanical ventilation is often poorly understood so it is beneficial to provide information to explain how a room is ventilated 
• It is important to consider both the amount of ventilation and where airflow goes in a building

Related