Your partner Skin's CEO just posted this24 Aug 2020 15:32
There is a difference to how long droplets (greater than 5 micron) and aerosols (smaller than 5 micron) remain in the air, particularly in a confined space. Real simple terms Aerosols may reach the lung while droplets tend to linger in the upper respiratory tract (where they take the swaps from). The smaller the particle is, the longer it is likely to stay in the air. Published data suggest that droplets (larger size) have a higher transmission rate than aerosols.
Coughing, sneezing or singing are more likely to transmit, than normal breathing. So how hard would it be to capture and tell everyone that someone in the room is infectious?
Let's make it vivid. If 50 people were in a large function room and one person on one side of the room were smoking, the other side would perhaps be subject to secondary smoke only if there was no real air circulation and to be honest the amount would be nominal. Same applies to a swimming pool. 50 people in a pool, one kid has a pee. Same scenario, yuckier vivid image :)
The point I am making is that the amount of volume of air in the room is critical to whether you can check for the virus in droplets of one or two people in a large area and likely you would miss it.
Better option is to have everyone test before you go into the room. That is the current problem in need of a real-time solution. That is what we have been working on and will reveal soon