Was the COVID test done with live virus blown through the actual air filter, or with something else?
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Was the COVID test done with live virus blown through the actual air filter, or with something else?
No. Live SARS-CoV-2 was placed on a small piece of treated nonwoven material in a laboratory contact test, and the tests that carried virus through a filter in moving air used bovine coronavirus and a pseudotyped model virus.
The peer-reviewed paper is Gong, Or, Sze et al., Microbiology Spectrum 12(9), e0409723, American Society for Microbiology, September 2024, doi 10.1128/spectrum.04097-23. The paper reports laboratory results on SARS-CoV-2 in contact with treated textile, on aerosolised bovine coronavirus passed through a test filter in a wind tunnel, and on bacterial viability on treated textiles; each result belongs to the article that was tested. A second peer-reviewed paper, Scientific Reports (2023) 13:13947, compared a C-POLAR treated filter with an untreated spunlace nonwoven filter against an aerosolised pseudotyped virus, and reports that the treated filter captured more of it. That virus is the pseudo-type SARS-CoV-2 named on the Validation page, a laboratory model, not live SARS-CoV-2. A result on a small piece of material is not a result on a finished air filter, and a result on one virus is not a result on another.
Source: C-POLAR — Validation, https://cpolar.tech/validation/; Gong, Or, Sze et al., Microbiology Spectrum 12(9), e0409723, American Society for Microbiology, September 2024, doi 10.1128/spectrum.04097-23; Scientific Reports (2023) 13:13947, https://doi.org/10.1038/s41598-023-41245-8.
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