67 students. 6 weeks. 87 infections.
A new study finds the real driver of school virus spread isn’t close contact — it’s air.
Poor ventilation (CO₂ >1000 ppm) nearly doubles transmission risk. Hours in shared classrooms (RR 3.17) matter far more than minutes spent near someone (RR 1.16).
It’s the air we share. Fix ventilation.
https://www.nature.com/articles/s41467-025-66719-3 #press
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@cbarbermd It was already known in 2019. Did we do something about it? Nope.
