Health
COVID-19 diffuses 1,000 times more likely from air particles than on the surface: study
According to one study, people are 1,000 times more likely to be infected with COVID-19 from viral particles in the breathing air than from the surface they come into contact with.
Researchers at the University of Michigan (UM) in the United States collected air and surface samples during an on-campus environmental monitoring program from August 2020 to April 2021.
Published last week in the Journal of Exposure Science & Environmental Epidemiology, the study examined public spaces such as classrooms, rehearsal rooms, cafeterias, baths, gyms, student buildings, ventilation and air ducts.
“The risk of surface infections was one-thousandth that of airborne infections,” said Chuanwu Xi, a professor of public health at UM.
“Also, the total number of cases on campus was significantly higher in the weeks with positive environmental samples than in the non-positive weeks,” Xi said in a statement.
For air samples, Xi et al. Used a wet-walled cyclone bioaerosol sampler that uses a pump to draw in large amounts of air and capture virus particles in the air.
On the surface, researchers used a cotton swab kit. Overall, between August 2020 and April 2021, researchers collected 256 air samples and 517 surface samples.
They had positive rates of 1.6% and 1.4%, respectively, and a probability of infection of approximately 1 per 100 exposures to S-CoV-2 aerosol by inhalation, contaminated surfaces in a simulated scenario. Found to be once in 100,000 times from.
Researchers said the study was conducted during the blockade of the university campus, so no samples were collected in a crowded space, and some samples were only collected when there were few people.
“Our results are a valuable addition to our understanding of infectious diseases and mitigation efforts during this pandemic and help prepare for future outbreaks of respiratory diseases with similar transmission mechanisms.” Said Rick Nichel, a professor of public health at UM.
“This is another advanced layer for assessing major transmission routes and identifying higher-risk physical spaces, and control measures in such spaces are to reduce the spread of the virus. It’s essential and more effective, “Neitzel added.
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Sources 2/ https://www.businesstoday.in/coronavirus/story/covid-19-spreads-1000x-more-likely-from-air-particles-than-surfaces-study-332529-2022-05-06 The mention sources can contact us to remove/changing this article |
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