Re: Helmet efficacy test

On 4/16/2025 8:47 AM, AMuzi wrote:

On 4/16/2025 4:25 AM, John B. wrote:

 I have no idea what Mr Fauci said about anything but I would comment
that doctors and medical staff wear them in Thailand, Singapore,
Indonesia, and medical evacuation airplanes to my personal experience.

 I agree it's a popular custom. but the size of viruses and the pores of masks make that theater at best.

I disagree. It's apparently a common fallacy that a filter's pore size must be smaller than particle size for the filter to work, but that's simply not the case.
Plus, as Fauci noted, with airborne diseases, you're not typically dealing with a naked virus particle floating in air. You're dealing with tiny drops of fluid that contain viruses. If those impact a filter fiber, they stick, even if there's an adjacent pore that's larger than the diameter of the drop.

If you can breathe without difficulty and if it's not well sealed at the edges, you're not blocking viruses.

You're not blocking 100% of them. I see this argument as yet another example of "this measure is not perfect, so let's pretend it's worthless." You, Andrew, have applied that quasi-logic to many laws in discussions here.

Regular hospital masks can be and probably are effective for bacteria but the size scales are radically different for viruses.

Most medically trained people seem to disagree.
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- Frank Krygowski