Opinion: COVID can spread through aerosols light enough to remain suspended for hours, that can travel more than six feet. I will still be wearing my N95 for the foreseeable future, especially in crowded indoor spaces. I hope you will join me.
In November 2021, after a Christmas party in Oslo, Norway, approximately 70 per cent of the 111 interviewed guests were diagnosed with COVID-19. This and many other super-spreader events supported what some scientists had been saying since the start of the pandemic: COVID is airborne.
By mid-2021, however, mounting evidence showed that COVID-19 was primarily spreading through aerosol transmission, which means it can transmit through the air via suspended respiratory fluid droplets smaller than 100 microns. These aerosols are light enough to remain suspended for hours, and can travel more than six feet.
Combating an airborne virus is challenging in indoor settings. It requires additional measures such as upgrading existing building ventilation, adding stand-alone air filters, installing ultraviolet germicidal irradiation, reducing crowds, limiting time spent indoors and ensuring everyone wears well-fitted medical-grade masks such as N95s.
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