NYT Admits Plastic Covid Barriers Provide False Service Sense of Security, Could Make Things Worse
You know those plastic Covid-19 barriers which sprung up everywhere to physically separate us for the past 18 months? It turns out they probably don’t help, and may make things worse.
In short, what may work for droplets does not work on an aerosolized virus.
According to the New York Times, “scientists who study aerosols, air flow and ventilation say that much of the time, the barriers don’t help and probably give people a false sense of security. And sometimes the barriers can make things worse.”
In addition to stifling airflow and ventilation, the barriers can deflect germs to innocent bystanders such as another worker or customer.
Under normal conditions in stores, classrooms and offices, exhaled breath particles disperse, carried by air currents and, depending on the ventilation system, are replaced by fresh air roughly every 15 to 30 minutes. But erecting plastic barriers can change air flow in a room, disrupt normal ventilation and create “dead zones,” where viral aerosol particles can build up and become highly concentrated. -NYT
“If you have a forest of barriers in a classroom, it’s going to interfere with proper ventilation of that room,” said Virginia Tech professor of civil and environmental engineering, Linsey Marr. “Everybody’s aerosols are going to be trapped and stuck there and building up, and they will end up spreading beyond your own desk.”
That said, there are ‘some situations’ in which the clear shields might be protective – as they can stop wet sneezes from splattering on others, but Covid-19 is largely spread via aerosol transmission – which laughs at plastic barriers (and masks alike).
A study published in June and led by researchers from Johns Hopkins, for example, showed that desk screens in classrooms were associated with an increased risk of coronavirus infection. In a Massachusetts school district, researchers found that plexiglass dividers with side walls in the main office were impeding air flow. A study looking at schools in Georgia found that desk barriers had little effect on the spread of the coronavirus compared with ventilation impro
Article from LewRockwell