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Having a conversation with someone in close quarters while infected with COVID-19 could be just as dangerous as coughing near them, new research published Wednesday suggests.
New online tool can calculate Covid-19 transmission risk in poorly-ventilated places
January 21, 2021
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Scientists agree that the vast majority of Covid-19 cases are spread through indoor transmission, whether via aerosols or droplets
Researchers from the University of Cambridge and Imperial College London have quantified the role of ventilation in Covid-19 infection spread.
They have found that in poorly-ventilated spaces, the virus spreads further than two meters in seconds, and is far more likely to spread through prolonged talking than through coughing.
The results, reported in the journal Proceedings of the Royal Society A and Science Daily, revealed that social distancing measures alone do not provide adequate protection from the virus.
Researchers have developed a new online tool that can calculate the risk of COVID-19 transmission in poorly-ventilated places, showing that when two people are in such spaces and neither is wearing a mask, prolonged talking is far more likely to spread the novel coronavirus than a short cough. The research, published in the journal Proceedings of the Royal Society A, also shows that the virus spreads further than two meters in seconds in poorly-ventilated spaces. The researchers, from the University of Cambridge and Imperial College London in the UK, noted that when speaking, we exhale smaller droplets, or aerosols, which spread easily around a room, and accumulate if ventilation is not adequate.
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