- New study looking at influenza transmission 1 infected person shared small low humidity and poorly ventilated room with 8 uninfected subjects (plus 2 observers). Chatting, playing uno, bit of exercise 5000+ppm CO2 no one got infected 🧵 1/n
- There's plenty that would baulk at CO2 = 5000ppm, raw dogging the air etc but as we've been pointing out for years, if the infector isn't emitting much virus then your inhaled dose will be low, even if ventilation is poor 2/n a link to the other place x.com/moog77/statu...
- This study included multiple interactions between donors and recipients, some the CO2 only got to 2400ppm, but the authors note that despite the donors having high viral load from swabs they emitted low levels of virus 3/n
- air sample in the room only detected low levels of viral genomic material, and exhaled breath samples were also low in viral material. Items were passed around, tablet, microphone and marker pen. Some viral material found on one sample from the pen 4/nJan 23, 2026 12:14
- Although there was low ventilation rates in these rooms, there was high mixing rates and the authors postulate that this could have rapidly mixed exhaled plumes that ordinarily would hold more concentrated viral material and support close range transmission 5/n
- Despite creating an environment that would be hypothesised to support flu transmission, other factors matter: immunity of recipients viral emission rates close range transmission number of coughs tbh i think this shows that "it's complicated" /end journals.plos.org/plospathogen...
