Just in time for Thanksgiving, @Covirt19, an international COVID-19 research team that I'm fortunate to co-lead (cov-irt.org) along w/ @AfshinBeheshti , just launched a COVID-19 Exposure Assessment Tool. Download the interactive PDF here --> cov-irt.org/exposure-asses….
This simple-to-use nomogram allows users to estimate a group-wide relative exposure to SARS-CoV-2 associated with various activities. The tool facilitates understanding of the importance of factors that contribute to increased SARS-CoV-2 exposure and risk of infection.
1/n
1/n
The COVID-19 risk nomogram incorporates both scientific principles and recent findings regarding virus characteristics to assess relative exposure risk based on key mechanistic and epidemiological factors including:
2/n
2/n
1) Emission rate of virus
2) Viral aerosol degradation & removal
3) Duration of activity/exposure 4) Inhalation rates
5) Ventilation rates (indoors & outdoors)
6) Volume of indoor space
7) HVAC filtration removal efficiency
3/n
2) Viral aerosol degradation & removal
3) Duration of activity/exposure 4) Inhalation rates
5) Ventilation rates (indoors & outdoors)
6) Volume of indoor space
7) HVAC filtration removal efficiency
3/n
8) Mask use & effectiveness
9) Distance between people
10) Group’s adherence to public health guidance
11) Size of group
12) Prevalence of infection in the population
This nomogram can be broadly applied to many situations & scenarios, including workplaces and schools.
4/n
9) Distance between people
10) Group’s adherence to public health guidance
11) Size of group
12) Prevalence of infection in the population
This nomogram can be broadly applied to many situations & scenarios, including workplaces and schools.
4/n
The model’s results are aligned with the United States Occupational Safety and Health Administration (US OSHA) classifications of exposure risks by benchmarking the exposure calculations to a baseline scenario that is considered high risk by US OSHA.
5/n
5/n
Finally, hats off to the team at @Covirt19 and @SigSci that have tirelessly worked on this nomogram to post before Thanksgiving, including Brian Schimmoller, Molly Isbell, @AfshinBeheshti, Som Dutta, @TenleyArcher. And many thanks to @Don_Milton & @jljcolorado for their feedback.
All thanks to Molly Isbell & @bschimmoller for making key improvements over the past 24 hours, we have posted an updated, simplified version of the CEAT to @Covirt19 website at cov-irt.org/exposure-asses…. thanks to @mandyonba @jqdsz for your feedback. #COVID19 #Thanksgiving2020 
• • •
Missing some Tweet in this thread? You can try to
force a refresh
