Scientists have figured out why the flu is not always transmitted in enclosed spaces

Being in the same room with a flu patient doesn't always lead to infection - especially if ventilation systems are actively working and heaters are being used. Scientists from the University of Maryland came to this conclusion following an unusual experiment.

As reported by BAKU.WS with reference to PLOS Pathogens journal, the study involved five students with confirmed flu and eleven healthy middle-aged volunteers. For two weeks, they lived on an isolated hotel floor, simulating normal everyday interactions - conversations, joint activities, and being in the same room. Despite close contact, none of the healthy participants became infected.

Scientists explain the result with several factors. The sick individuals barely coughed, so the concentration of viral particles in the air remained low. Additional protection was provided by constant ventilation, heaters, and air dehumidifiers, which contributed to the rapid reduction of viral load in the room. The age of the volunteers also played an important role - middle-aged people are generally less susceptible to flu than young people.

"Coughing remains the main risk factor for virus transmission, especially in rooms with stagnant air," the researchers note.

To reduce the likelihood of infection, experts recommend using portable air purifiers and wearing N95 masks, especially in poorly ventilated spaces.