Photo by Yoann Boyer on Unsplash
THE OMICRON VARIANT OF COVID-19 appears to survive twice as long on surfaces as the original coronavirus strain from Wuhan, China. What are the implications in terms of spreading through touch?
Let’s explore recent research findings suggesting that the Omicron variant remains on the skin, paper, and plastics for longer than historical strains of the virus.
First, a caveat: The two research studies we will discuss Omicron examine virus staying power on surfaces, but under artificial circumstances.
Some preprints provide some guidance but remember that they have been posted online before a review by outside experts and publication.
Japanese researchers took viruses from each significant COVID-19 variant in the first study. After concentrating and purifying the samples, they spread the viruses on squares of plastic and human cadaver skin. The scientists kept the samples in warm air (approximately 77 degrees F).
Here are the results of the Japanese study:
The second study
Hong Kong researchers spread samples of the original strain of the COVID-19 virus and the Omicron variant on squares of glass, paper, plastic, and stainless steel. Let’s look at the results:
The original virus survived two days on plastic and stainless steel and approximately four days on glass. The Omicron variant survived about seven days on those surfaces and survived longer on printer paper and tissue.
The primary mode of Omicron transmission is close contact and aerosol. Professor of Public Health Dr. Leo Poon of Hong Kong University reminds us:
“Omicron is still mainly transmitted by close contact and aerosol. We want to highlight that we should also pay attention to hand hygiene and disinfection of contaminated surfaces.”
I will continue to focus my cleaning (or avoidance) on places frequently touched by others, including door handles, elevator buttons, and handrails. The authors note that the team studied Omicron BA.1 and not the newer BA.2.
Are these studies perfect? No, they did not occur in real-life conditions. Viruses outside the lab don’t get to lounge in warm room air. Still, Omicron appears hardier than earlier COVID-19 viruses.
Fortunately, you can break the transfer of virus from surfaces into your nose or mouth. You know what you need to do: Wash your hands.
Craig Martin is a strategic chameleon in health innovation. He is equally at home in…
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