Yorbimg Staff Monday July 6, 2020. *Featured Image: FreePik.com [accessed July 6, 2020].
News Story By The Brussels Times, “More Than 200 ScientistsDispute WHO Theory On Covid-19 Transmission“, July 5, 2020.
More than 230 scientists from 32 different countries have signed an open letter to the World Health Organisation (WHO) disputing the official view on how the coronavirus Covid-19 can be spread by aerosol.
The official view of Covid-19 transmission supports two methods: droplets of saliva from an infected person produced during coughing or sneezing, which are then inhaled by someone else in the vicinity; and particles picked up from surfaces contaminated by such droplets, and then introduced to eyes, nose or mouth by someone else.
However the open letter, due to be published next week in a scientific journal, argues that there is a third method.
In normal circumstances people produce aerosol droplets when singing or even speaking, which are much smaller than those produced in coughing and sneezing, and which because of their size, hang longer in the air and are also more likely to be carried on currents of air.
The case for aerosol transmission came to light when 53 members of a 61-member choir in the US became infected in March despite observing sanitary measures. Two of those infected died.
Scientists suggested that group singing was the source of the infection: a large group of people in a confined space breathing more or less in time with each other, and breathing in and out more forcefully than usual while singing. Get the rest of the story here.
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