Cobid meter3/31/2024 ![]() ![]() By contrast, less than 1 percent of particles cross the two-meter mark if masks are worn.īuilding on models used by scientists to study the flow of liquids and gasses, the team from McGill University, Université de Sherbrooke, Texas A&M University, and Northern Illinois University, developed a computer program to accurately simulate coughing dynamics in indoor spaces. In a study published in Building and Environment, the researchers found that when people are unmasked, more than 70 percent of airborne particles pass the two meters threshold within the 30 seconds. While most public health guidelines recommend physical distancing of two meters for people from different households, the researchers say distancing alone is not enough to prevent the spread of COVID-19. "Mask mandates and good ventilation are critically important to curb the spread of more contagious strains of COVID-19, especially during the flu season and winter months as more people socialize indoors," says Saad Akhtar, a former doctoral student under the supervision of Professor Agus Sasmito at McGill University.
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