Thank you so much.
Thank you to all the witnesses for being here and giving excellent testimony. In particular, to the two physicians, thank you for what you've been doing in the news media. I've heard you both and I think you're really helping Canadians to interpret the situation with COVID-19.
Dr. Bogoch, certainly you referenced the precautions that are being taken on airlines. You know that Canadian airlines did follow IATA recommendations. They were instituted in July. You and Dr. Chagla both mentioned the filtration system and masking. There are also temperature checks.
If you look at data, are you able to...? Obviously none of these things, such as doing temperature checks, is in any way harmful. Are you able in any way to quantify the most valuable type of intervention? It sounds as though filtration and air turnover and so on are the most important? Would you confirm that?