Jonathan Van Tam just said that he really admires the Japanese approach to risk.
They look for
- closed spaces (with poor ventilation)
- crowded places
- close contact settings
These are the 3 Cs
Also
D - duration, e.g. being in the same place for several hours and
V- volume - people shouting/ singing/ speaking animatedly
I was fascinated by this.
article here on Japanese schools. Masks. Perspex shields. Windows designed for adequate ventilation with safety provisions to stop pupils falling out. The attached picture is of an elementary school.
Can anyone perhaps explain why if this approach is so admired, secondary schools are open in the way that they are, when they contain young adults, and they currently have the highest % of any age group infected?