Events with aerosol exposure/infection

New preprint showing that normal respiratory activities produce more aerosols than do "aerosol generating procedures" such as high-flow nasal oxygen and positive pressure ventilation. https://t.co/IMxSaMRT7L HT: Guy Marks pic.twitter.com/t9TY8VSkdk

— Linsey Marr (@linseymarr) February 16, 2021

Infections

[Thread] Learning from #COVID19 #superspread

🇺🇸USA Skagit Choir practice: 1 person with mild symptoms, 2.5-hours indoors, 50 infected, 2 deaths

“you can be inhaling what someone else exhaled even if they are far away from you” 1/ https://t.co/6q611svPIc

— Orla Hegarty (@Orla_Hegarty) January 23, 2021

 

🇨🇦 Canada, care home #COVID19 #superspread

In just 16 days: 127 residents (40 died) & 86 staff (1 died) & 42 other household contacts were infected

“first staffer who tested positive was close contact with someone who travelled internationally” /32 https://t.co/91yv6bvYBo

— Orla Hegarty (@Orla_Hegarty) January 25, 2021

Beim #Essen im #Zug darf man die #Maske kurz abnehmen. Diese Ausnahme wird jedoch missbraucht. Nun reagieren #BAG und #SBB.https://t.co/KXNlCsRLWi

— SRF News (@srfnews) January 26, 2021

Infections in young children (aged 0-9 years) surged by 84% in Belgium after testing in schools was increased.

The increase for the population overall was only 5%.

⚠️ The idea young children are less susceptible is a myth, due to insufficient testing.https://t.co/b9eVzTO2z3

— Dr Zoë Hyde (@DrZoeHyde) January 27, 2021

🇧🇪 Belgium, care home

75 cases, including 14 staff

“Santa was not feeling unwell before the visit & did not show any symptoms of virus... he kept his distance from residents & wore a face covering” /44 https://t.co/YcV9n3UGuX

— Orla Hegarty (@Orla_Hegarty) January 28, 2021

Case report of a hospital COVID-19 outbreak probably caused by airborne transmission. A child with an infected mother was admitted, after which 6 healthcare workers, 2 child patients, and 1 parent tested positive.

H/T: @CPita3 via @lisa_iannattone.https://t.co/d2DfHVCEut pic.twitter.com/InIPt0AxDc

— Dr Zoë Hyde (@DrZoeHyde) January 31, 2021

Covid 19 coronavirus: LSG Sky Chefs and its communal cafeteria - a possible area of contamination? [NZHerald, Feb 17 2021]

New Zealand: 1 index case airport at service firm and no other colleagues found infected so far (as of Feb 19)

Burnet Institute epidemiologist Mike Toole said if Holiday Inn hotel workers had been wearing fitted N95 respirators and face shields they would have been unlikely to get infected.

 source: Experts call for PPE upgrade as Holiday Inn cluster grows to eight [Sidney Morning Herald, Feb 10 2021]

related:

6/ If the person is infected, they may also exhale respiratory aerosols that contain the virus. ALL THE TIME, not just when using the nebulizer.

Perhaps the nebulizer might increase the emission of virus-containing aerosols? (Is there any evidence for this? If so pls link here)

— Jose-Luis Jimenez (@jljcolorado) February 15, 2021

No/ few infections 

HOPE FOR SCHOOLS? Among 17 rural Wisconsin schools, with high student mask-wearing, the #COVID19 incidence among students & staff was lower than in the county overall (3,453 versus 5,466 per 100,000). Only 7 of 191 cases linked to in-school spread.https://t.co/tpCE8GgFXk pic.twitter.com/rX6aZfum2L

— Eric Feigl-Ding (@DrEricDing) January 26, 2021

Organizational "anecdotes" like this are interesting & powerful, especially for a business with a budget as high as the @NFL. They are profoundly more motivated by keeping players in the game than by regulations or ideology. In this case, following good science protects huge $$. https://t.co/HcHwkjWngw

— Dr. Alex Huffman (@HuffmanLabDU) January 26, 2021