- nonsocomial spread of SARS-CoV-1 was linked to aerosol-generating medical procedures [^stability]
- "The virus aerosol deposition on protective apparel or floor surface and their subsequent resuspension is a potential transmission pathway and effective sanitization is critical in minimizing aerosol transmission of SARS-CoV-2." [^aerodynamics]
- airborne SARS-CoV-2 found at 0.25-0.5um and <2.5um, but not coexisting so potentially different formation mechanisms [^aerodynamics]
- air samples in various location collected and filtered through [cascade impactor](https://www.skcinc.com/catalog/index.php?cPath=300000000_302000000_302400000_302400200) then tested for presence of SARC-CoV-2
- air samples in various locations collected and filtered through [cascade impactor](https://www.skcinc.com/catalog/index.php?cPath=300000000_302000000_302400000_302400200) then tested for presence of SARS-CoV-2
- "We believe one direct source of the high SARS-CoV-2 aerosol concentration may be the resuspension of virus-laden aerosol from the surface of medical staff protective apparel while they are being removed. . . We hypothesize the submicron aerosol may come from the resuspension of virus-laden aerosol from staff apparel due to its higher mobility while the supermicron virus-laden aerosol may come from the resuspension of dust particles from the floors or other hard surfaces" [^aerodynamics]
so we're targeting filter material able to block particles with minimum ~0.25um diameter and high flow rate for comfortable breathing
### mask characterization metrics
- filtration efficiency: percent efficiency of upstream colony-forming units (cfu) to downstream cfu [^DIYmask]
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@@ -29,7 +30,7 @@
- Collison nebulizer - generally a pneumatic atomizer [^collisonNebulizer]
- mobile henderson appartus 1968 [^henderson]
performance difference between pleated hdrophobic filters and electrostatic filters??
performance difference between pleated hydrophobic filters and electrostatic filters??
### Resources
[^DIYmask]:University of Cambridge [DIY mask efficacy testing](https://www.researchgate.net/publication/258525804_Testing_the_Efficacy_of_Homemade_Masks_Would_They_Protect_in_an_Influenza_Pandemic)
