CU studies confirm that unmasked singing spreads COVID through particles – CBS Denver

Boulder, Colorado (CBS4) – A new study by scientists at the University of Colorado has found that COVID-19 particles can easily spread when sung without an internal mask. This study considered the March rehearsal in Washington.

The study was peer reviewed and Published in Journal Indoor AirProve that the projected aerosol spreads the virus by unmasking and singing. Researchers studied a choir rehearsal on March 10 in Skagit Valley, Washington. One person with mild COVID-19 symptoms participated in a two and a half hour indoor rehearsal. In the weeks that followed, almost everyone (more than 50) who attended the procedure had the disease. Eventually two people died.

(Credit: University of Colorado)

The attendees disinfected the surface so that they would not touch each other. From that observation, scientists sang and concluded that the particles were expelled into the air and spread the disease.

The attendees were not wearing masks.

Researchers interviewed representatives of Corral and calculated infection rates based on rehearsal details and known facts about the SARS-CoV-2 virus. Scientists have concluded that there are no windows large enough for droplets and infected surfaces to convey the number of people affected. However, poor ventilation in the practice area led to what researchers called “the accumulation of aerosols produced by the singer himself mixed the air in the room.”

“Inhalation of infectious respiratory aerosols from’shared air’was the main mode of infection,” said co-researcher and collaborator Jose Luis Jimenez of the Institute for Environmental Sciences. He said.

The infection rate in clinical practice was 87%, 52 people. Researchers have found that reducing the practice to 30 minutes reduces the infection rate to 12%, or 5 people.

Prior to that event, there was a known incident in Skagit County. Other super-proliferation events related to choir practice have been recorded in the Netherlands, Austria, Canada, Germany, the United Kingdom, South Korea, Spain and France.

“This study adds to the overwhelming evidence that aerosol propagation causes this pandemic and plays a major role, especially in hyperdiffusion events,” Jimenez said.

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