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Those anticovid plastic barriers probably won’t help and can make things worse

Most researchers say that screens are most likely to be useful in very specific situations. For example, bus drivers, who are protected from the public by floor-to-ceiling barriers, are probably protected from inhaling much of what passengers are exhaling. Bank tellers behind glass walls and clerk checking in patients at the clinic may be at least partially protected by a barrier.

Research by researchers In collaboration with the National Institute of Occupational Safety and Health in Cincinnati, we used a cough simulator to test transparent barriers of various sizes in isolation rooms. This study, which has not yet been peer-reviewed, found that under appropriate conditions, a high shield above “cough height” prevented about 70% of the particles from reaching the opposite particle counter. rice field. Shop and salon workers will be sitting or standing.

However, the authors of the study pointed out that the limits of the study, especially the experiments, were conducted under highly controlled conditions. The experiment was conducted in an isolated room with a constant ventilation rate that “does not accurately reflect all actual situations,” the report said.

The study found that workers and customers were moving around, others could be in the room and inhaling redirected particles, and many stores and classrooms had acrylic barriers that blocked normal airflow. It is not considered that there are multiple stations, not just one.

Further research is needed to determine the effect of adding a transparent shield around the desk in a school or office, but all aerosol experts interviewed found that the desk shield was useless and interfered with normal ventilation of the room. I agreed that there is a possibility. Under some conditions, a plastic shield can cause virus particles to accumulate in the room.

“If there are aerosol particles in the classroom air, those shields around the student do not protect them,” said Richard Corsi, the next director of engineering at the University of California, Davis. “Depending on the airflow conditions in the room, downdrafts can enter the small spaces that are currently trapped, causing particles to concentrate in the space.”

Aerosol scientists focus on schools and workplaces encouraging workers and qualified students to vaccinate, improve ventilation, add HEPA air filters as needed, and impose mask requirements. It says it should be guessed.

Those anticovid plastic barriers probably won’t help and can make things worse

Source link Those anticovid plastic barriers probably won’t help and can make things worse

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