Thank you for the question.
It is true. There have been a lot of committees in place—for example, in the U.S., Europe, Belgium and France—to discuss what the standard should be. We already have standards that exist from different organizations.
Experts in ventilation could definitely explain it better than me, but from what I have read and what I see worldwide in countries that have taken on the task of improving indoor air quality is that they rely on CO2 measurements to give an idea of how efficient the ventilation and air exchange is inside. I think, from what they have done so far, it's a good and easy measurement with the apparatus that is available right now. They can measure how the air is changed in an environment.
I think it's really powerful because it will indicate, in terms of infectious diseases.... It's what we need. We need the air to be exchanged to decrease the number of aerosols inside. There are different associations in the world committed to defining the standard. They are already out there. For example, Belgium or France have decided to go with 800 parts per million as a definition. In Quebec, we are still at 1,500, which is far above the international standards that have been decided.
I think we need to discuss with the international commissions to adopt the same standard.