Does everything -- smartphones, wallets, money and keys -- need to be washed down with hot water and soap?
"We are all swimming through an invisible swamp of bacteria, viruses, fungi and parasites," noted Dr. Stephen Berger, co-founder of the Global Infectious Diseases and Epidemiology Network in Tel Aviv, Israel. "Those bookshelves and those pictures on the wall are teeming with ugly microbes. Not to mention your cellular phone, wristwatch, eyeglasses and everything else in your world."
In fact, "the list of objects which could potentially be contaminated is endless," he cautioned.
But that does not mean that everything you take outdoors needs a biohazard scrub-down upon return, Berger added.
"The good news is that you are in no danger from most of this," said Berger. "And you have no reason to compulsively avoid, or even clean, every object in your personal world. With one exception: your own hands!"
Why? Because when it comes to COVID-19 infection risk, "the true culprit here is your own hands," he said.
Which is not to say that inanimate objects don't pose any risk. They do, said Berger. And guidelines from the U.S. Centers for Disease Control and Prevention recommend that people do clean their phones and electronics, either following the manufacturers' guidelines or by using wipes or sprays containing at least 70% alcohol.
"The current COVID-19 pandemic is caused by a virus. That virus will infect you through your nose or mouth, in most cases because somebody coughed -- or perhaps only breathed -- within a few feet of you," Berger said.
"But perhaps that same somebody coughed into his hand, or toward a nearby object, or simply opened a door. Later that day, you shake that hand in greeting, touch that table or grasp that doorknob. And then, you use your own contaminated hand to eat a snack," he explained.
By Alan Mozes