In the hospital
The picture below shows the modern resuscitation room in the small hospital in which I work in country Australia. I happened to be sitting outside a café in the town with two of our sons on a day off when my wife, also a doctor, called to say she had a seriously ill patient in resus and could I come along and help? So I did. The story of the afternoon is written in the CO2 trace recorded by the Aranet4 I carry on my belt at all times.
This is an otherwise excellent resuscitation room with three beds, but with just one bed occupied and a number of staff treating that patient, the CO₂ level rose to an unacceptable 1000ppm. You can see how it falls when I go outside to talk to my sons and then climbs again when I go back inside. We have a lot of work to do to make our healthcare spaces and other inside spaces safe.