My blog at the time is very short, but links to two papers about CO2 and COVID.
https://www.statnews.com/2024/06/04/co2-ventilation-research-virus-airborne-life-haddrell-celebs/?utm_campaign=rss
They note that it isn't just a great proxy for the air too close to be safe from infection...
...it turns out that CO2 is like an acid/base buffer and keeps the air chemistry friendly to COVID, it lasts much longer in the air, above 800.
Yes, COVID is no longer feared, but I can't imagine any reason that conclusion doesn't apply to colds and flu viruses.
edit: link just fixed
STATA new discovery about carbon dioxide is challenging decades-old ventilation doctrineCO2 is a good proxy for how much exhaled — and potentially infectious — air is in a room. New research suggests the more CO2 there is, the more virus-friendly the air becomes.