@jonty @james As with many events, there is a lot of limited quality commentary online because people are either are not present or don't have language-specific knowledge to understand what is going on.
For example there's been a lot of discussion here in NOC yesterday auf Deutsch with the HVAC techs from the building where they have adjusted a lot of settings and I understand they are actually monitoring CO2; there's also a team deploying these huge HEPA filters in smaller rooms.