Timeline – A – Page 3 – LEARN FROM COVID

March 17, 2020

Federation of European Heating, Ventilation and Air Conditioning associations (REHVA) publishes guidance document suggesting changes to operation of the HVAC systems to stop air recirculation and increase the inflow of outdoor air to prevent the spread of COVID-19.

The Federation of European Heating, Ventilation and Air Conditioning associations (REHVA), published an updated guidance on How to operate and use building services in order to prevent the spread of the coronavirus disease (COVID-19) virus (SARS-CoV-2) in workplaces. This document suggests changes to operation of the HVAC systems in order to “prevent the spread of […]

March 10, 2020

Skagit Valley Chorale outbreak (Washington, US) super-spreader event at rehearsal where 1 index case spreads COVID-19 to 53 of 61 members in attendance via inhalation of respiratory aerosols generated while singing.

Miller, Shelly l., Nazaroff, William W. et al. 2020. “Transmission of SARS‐CoV‐2 by inhalation of respiratory aerosol in the Skagit Valley Chorale superspreading event.” International Journal of Indoor Environment and Health, 2020;00:1–10.

March 1, 2020

Aerosol transmission route for SARS-CoV-2 infections is implicitly recognized by WHO in technical briefing, proposing as precautionary measure to flush toilets with closed lid (fecal-oral transmission via aerosols).

March 1st technical briefing from WHO referenced on page 2 in: https://www.rehva.eu/fileadmin/user_upload/REHVA_COVID-19_guidance_document_ver2_20200403_1.pdf

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Timeline – A

Federation of European Heating, Ventilation and Air Conditioning associations (REHVA) publishes guidance document suggesting changes to operation of the HVAC systems to stop air recirculation and increase the inflow of outdoor air to prevent the spread of COVID-19.

Skagit Valley Chorale outbreak (Washington, US) super-spreader event at rehearsal where 1 index case spreads COVID-19 to 53 of 61 members in attendance via inhalation of respiratory aerosols generated while singing.

Aerosol transmission route for SARS-CoV-2 infections is implicitly recognized by WHO in technical briefing, proposing as precautionary measure to flush toilets with closed lid (fecal-oral transmission via aerosols).