According to a study published in the journal Physic of Fluids published on August 17, 2020, wearing masks should be mandatory when entering a public bathroom. USA Today reported that urinals may shoot plumes of inhabitable COVID-19 particles into the air. COVID-19 can be found in a person’s urine or stool and flushing urinals can generate an upward flow projecting particles further than a toilet flush. It is also advisable to close a toilet seat before flushing it. anti-diffusion improvements are urgently needed to prevent the spread of COVID-19. Researcher Xiangdong Liu said in a press release “Anti-diffusion improvements are urgently needed to prevent the spread of COVID-19.”
Liu and other researchers from Yangzhou University in China simulated urinal flushing using computer models and estimated that, within just five seconds of flushing, virus particles could reach a height of more than 2 feet off the ground.
“Potentially, it could contaminate other surfaces you would touch – the handle, the tap,” said Charles Gerba, a professor of virology at the University of Arizona. “The concern is also – was there anything left over from the person who was there before? Aerosolization from the previous user you may potentially inhale?” At least two studies – one in Tokyo and one in Guangzhou, China – have found COVID-19 RNA in patients’ urine. It’s still unclear whether COVID-19 can transmit through urine and infect another person, Gerba said. More research needs to be done.
Research on particles kicked up in “plumes” has been around for about two decades now, said Joshua Santarpia, a professor of pathology and microbiology at the University of Nebraska Medical Center specializing in bio-aerosols.
“What’s worse, two of COVID-19 reemerging confirmed cases in Beijing have been reported to be infected from a public toilet, which practically proves the danger from the public restroom,” the researchers wrote.