A room full of flu patients and no one got sick
A room full of flu patients and no one got sick
www.sciencedaily.com
A room full of flu patients and no one got sick
In a striking real-world experiment, flu patients spent days indoors with healthy volunteers, but the virus never spread. Researchers found that limited coughing and well-mixed indoor air kept virus l...

TL;DR - factors that could have potentially resulted in this is - less coughing by infected patients, good ventilation, volunteer adults which were healthy were mostly middle aged which is less likely to be infected. We need to do more trials to understand how seasonal flus work.