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Fears about catching coronavirus from contaminated surfaces have driven some people to become compulsive about cleaning countertops and wiping down their groceries. As the pandemic took hold, some poison centers even reported increased calls about excessive exposure to cleaning agents.

In recent weeks, the Centers for Disease Control and Prevention appeared to adjust its stance on surface transmission of the coronavirus. New language on its website was interpreted as deemphasizing concerns, creating some confusion about the risk of catching covid-19 from frequently touched objects.

Pittsburgh-based infectious disease and critical care physician Dr. Amesh Adalja said that while the contact spread of the virus can certainly occur, it is not responsible for the bulk of transmission.

Weve always known that there is a small contribution from contaminated surfaces. I think the CDC guidance reflects the fact that were trying to focus on the main route of how this virus gets from person to person. It is from another person directly, Adalja said. Our public health strategy needs to be focused on eliminating the person-to-person spread,and there can be less emphasis on contact spread.

After some news outlets ran with the idea that the CDC was no longer concerned about surface transmission, the agency issued a statement clarifying that contact with a contaminated surface is still one way to catch covid-19.

It may be possible that a person can get covid-19 by touching a surface or object that has the virus on it and then touching their own mouth, nose or possibly their eyes. But this isnt thought to be the main way the virus spreads, the statement said. The change on the website was intended to make it easier to read, and was not a result of any new science.

Dr. Arvind Venkat, an Allegheny Health Network emergency physician, observed that we live in a hyper-connected world, and social media can create controversies that arent always there. So, the combination of not having consistent communication and an environment in which everything is so fragmented is a bad combination in a public health crisis.

Venkat also past president of the Pennsylvania College of Emergency Physicians said public health authorities must communicate carefully and accurately to maintain trust with the public.

Since this is a new virus, were still learning as we go along. The fact that there is contradictory and changing data is to be expected, Venkat said. So, when something changes, we need to make sure that we convey that in a systematic way so that it doesnt get perceived as going back and forth.

So, what are the chances of catching covid-19 from an object or surface laden with germs?

I think the relative risk of picking it up from common things given the precautions that everybody is taking is much lower, said Seema Lakdawala, assistant professor of microbiology and molecular genetics at the University of Pittsburgh School of Medicine.

But if you are a health care worker and you are working in a hospital setting with patients that are symptomatic and coughing and sneezing large volumes of the virus into their environment then, yes, the risk of catching it from a surface is much higher.

The feeling among medical experts who spoke with the Tribune-Review is people are unlikely to catch the virus from doing things like grocery shopping. Lakdawala, an expert in virus transmission, said she does not wipe down her groceries.

Everyone has their own comfort level. If somebody is taking the time to wipe down every single material three times, I would say that is a waste of their time, Lakdawala said. I think its important for the general public to understand, What kind of information do I need to make a risk assessment for myself?

Adalja said that while its important for people to continue to take protective action, they can be a little less concerned about contaminated surfaces they may have touched.

I think people can be less worried about making sure they scrub their groceries. Thats less likely to be impactful than other things, like washing your hands and trying to avoid crowded spaces and other social-distancing measures.

Paul Guggenheimer is a Tribune-Review staff writer. You can contact Paul at 724-226-7706 or pguggenheimer@triblive.com.

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This entry was posted on June 1, 2020 at 6:45 pm and is filed under Molecular Genetics. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed. |