study on COVID-19 in auditoriums found displacement ventilation minimized infection risk, while natural ventilation had highest spread.
Masks, shorter events, and lower occupancy helped reduce risks.
“Just so people reading this know:
When you have covid, you exhale covid particles into the air. Even with just ordinary breathing.
Those particles can then float on the air for hours.”
“How is COVID-19 spread? When people cough, sneeze or talk, viral particles can be sent through the air and via droplets. Masking helps to prevent droplet spread, and keeping more than two metres apart and staying in a well-ventilated area can help to limit aerosol spread.
While not a predominant cause of transmission, COVID-19 can also be spread through objects contaminated with secretions from an infected person. The incubation period for COVID-19 — the time from exposure to developing an infection — is about two to four days with the current variant.”
COVID patients breathe large amounts of virus early on
COVID patients exhale high numbers of virus during the first eight days after symptoms start, as high as 1,000 copies per minute, reports a new Northwestern Medicine study.
