Do plexiglass COVID barriers really work?
A restaurant employee cleans a plexiglass table divider while preparing for outdoor dining service in Manhattan Beach, California, November 21, 2020 a few hours before the start of the new 10:00 pm to 5:00 am curfew during increased Covid-19 restrictions.  The United States surpassed 12 million Covid-19 cases today, according to the Johns Hopkins University real-time tracker. (Photo by Patrick T. Fallon / AFP) (Photo by PATRICK T. FALLON/AFP via Getty Images)  (NEXSTAR)  Along with fist bumps and remote work, another legacy of the COVID-19 pandemic has been the plexiglass fortification of businesses, airports and government buildings. With the rate of COVID-19 infections falling in the United States, where a vaccine is readily available, coffee shop owners, school administrators and others may be wondering just how long they will keep the barriers in place. Bloomberg reports that sales of the material tripled during the pandemic, reaching roughly $750 million. The only problem, however, is that its hard to find evidence that the miles of barriers have effectively prevented COVID-19 transmission. Early in the pandemic, the Centers for Disease Control and Prevention said the coronavirus was spreading on surfaces and through droplets between people at close range  droplets plexiglass barriers are designed to catch. The CDC only fully acknowledged that it could also be transmitted through the air at distances greater than six feet last month. Howard A. Stone, a professor of Mechanical & Aerospace Engineering at Princeton University, worked with the Met Orchestra of New York in December, 2020 to study how a singers breath  captured with an infrared camera  moves away from the body. His team then used a fog machine to exam how a plexiglass barrier might protect someone on the other side  results were mixed. From my perspective, if youre on the other side of the barrier from someone, you are partially protected because the movement of the air is disrupted by the barrier, he told NJ.com. But nonetheless, it can get around.  Stone pointed out that the air that made it behind the barrier was mixed, suggesting that the plexiglass might help dilute virus-contaminated air. On the other hand, if youre inside one of these barriers with someone, and they happen to be infected and youre not aware of it, then youre exposed even more to a higher concentration of whats coming out, because the air inside one of these barriers wont mix as well with its surroundings, Stone said. In essence, the plastic tents over outside restaurant tables, for instance, could be trapping the very virus they were designed to protect against. A study published by the CDC examining the efficacy of tools to combat COVID-19 in Georgia elementary schools found that ventilation and the proper use of masks, rather than barriers, helped prevent the spread of the virus. In guidance from the University of Washington, a barrier can, however, be effective as one component of a larger strategy to prevent virus transmission if installed in a way that doesnt block ventilation or cause other safety risks. Iowa State University said in a news release that the school is already working on a second life for the acrylic materials used as barriers, which arent easily recyclable. Industrial design students have created plans for rechargeable laptop desks, class rings and art installations, among other things. It was an awake nightmare, that people will start chucking them into the landfill, Katie Baumgarn, classroom scheduling specialist for Iowa State University Facilities Planning and Management said. Some businesses are also trying to head off a recycling nightmare when people realize the barriers cant just be dropped off in residential bins. Faulkners, a plastic supply company in Miami, is hosting a recycling drive for business owners who want to drop off the barriers. The acrylic product can be broken through a process called chemical recycling to create new items, but many city recycling problems dont accept the material. Pandemic task force member and air quality expert Marwa Zaatari says plexiglass barriers may be treated like the COVID-19 pandemic regulations currently being rolled back as infection rates drop. Zaatari told Bloomberg she thinks it will only take a matter of weeks to remove all the plexiglass. The question is what theyre going to do with it.