Coronavirus at beaches? Surfers, swimmers should stay away, scientist says
Kim Prather, a leading atmospheric chemist at the Scripps Institution of Oceanography, wants to yell out her window at every surfer, runner, and biker she spots along the San Diego coast.
“I wouldn't go in the water if you paid me $1 million right now,” she said.
The beach, in her estimation, is one of the most dangerous places to be these days, as the novel coronavirus marches silently across California.
Many beachgoers know they can suffer skin rashes, stomach illness and serious ear and respiratory infections if they go into the water within three days of a heavy rain, because of bacteria and pathogens washing off roads and into the ocean. Raw or poorly treated sewage entering the ocean also poses major health risks.
Prather fears that SARS-CoV-2, the virus that causes COVID-19, could enter coastal waters in similar ways and transfer back into the air along the coast.
In her research, Prather has found that the ocean churns up all kinds of particulate and microscopic pathogens, and every time the ocean sneezes with a big wave or two, it sprays these particles into the air. She believes that this new coronavirus is light enough to float through the air much farther than we think. The six-feet physical distancing rule, she said, doesn't apply at the beach, where coastal winds can get quite strong and send viral particles soaring....
And though the virus has been detected in sewage, scientists are still investigating whether it remains infectious in fecal matter — and whether it survives treatment in a wastewater facility....
“Once things are in the air, they can go pretty darn far. People are shocked whenever I talk about stuff becoming airborne,” she said. “I see pictures of the beach shut down, and the signs tell you don’t walk on the beach, don't swim, don't surf, but nobody tells you: Don't breathe.”
Scientists are still debating the characteristics of this latest coronavirus. Recent research in the New England Journal of Medicine found that when the virus was suspended in a mist under laboratory conditions, it remained “viable and infectious” for three hours — though researchers have said that time period would probably be no more than half an hour in real-world conditions.
Charles Gerba, a professor of microbiology at the University of Arizona who has studied coronaviruses in wastewater since the SARS outbreak, said these kinds of viruses have typically been found to survive two or three days in raw sewage....
“People kept saying respiratory droplets and surfaces, surfaces, surfaces, but I just felt like no way, this is something special,” she said. “This thing is so contagious …. Look at that choir in Washington — those people weren’t coughing. They were just singing! But it got so many of them.” ...
