undefined | Better HN

0 pointsTylerE2y ago0 comments

The N95 guarantees a minimum of 95% filtration at the worst possible particle size, which airborne virus particles are not.

The 3M 9210s I’ve been wearing since 2021 have been independelty tested as having >99.5% filtration efficiency at the relevant particle size, and that’s with physical testing so stuff like ability of the make to seal is also being tested.

Zero COVID infections here.

0 comments

5 comments · 1 top-level

t0bia_s2y ago· 4 in thread

Potential Applications Include: Bagging, grinding, sanding, sawing, sweeping, woodworking and other dusty applications. source: https://multimedia.3m.com/mws/media/813534O/3m-aura-particul...

No words about viruses. Also, I recommend you to make IgG test for covid antibodies. Most likely you already have some.

ceejayoz2y ago

How are you managing to read "Potential Applications Include" as "The following is an exhaustive list of all possible applications"?

TylerEOP2y ago

They would never list healthcare on the general purpose version anyway, since there is a separate specific certification for that. The only difference is better fluid protection, which is irrelevant to the given threat model. They do indeed sell that.

https://www.3m.com/3M/en_US/p/d/v101143973/

And whatta ya know...

"This healthcare N95 particulate respirator and surgical mask has comfortable inner materials and helps provide respiratory protection against certain airborne biological particles. The individually packaged, flat-fold design allows for convenient storage prior to use.

Fluid-resistant surgical masks help reduce your exposure to blood and body fluids. Cleared for sale by the Food and Drug Administration (FDA)."

Notice it's still "just" an N95.

logifail2y ago

> I recommend you to make IgG test for covid antibodies. Most likely you already have some

I've had Covid at least twice since this nightmare started, most recently in November 2023.

After both a chest x-ray and a CT scan in hospital eventually a Covid PCR test[0] came back positive and at that point the mood lightened and the doctors told me that a positive Covid test was "the good news" and to go home and rest.

I appreciate Covid is still a threat to some elderly and/or sick people. To the majority of us, it isn't ... and wasn't ... ever [1][2]

[0] Unwitting comedy moment from the (otherwise friendly and apparently competent) student doctor. Took my history very thoroughly, felt my glands, examined ears and looked down throat. All without her wearing any kind of mask. Then late on she decided to take a Covid swab, so left the small room that we'd been in together for 10+ minutes to retrieve swab and FFP mask, which she donned to swab my nostrils. Am afraid I giggled when I saw her go get the mask, had to tell a lie to avoid exposing the utter nonsense of fetching one at that stage :) [1] https://twitter.com/d_spiegel/status/1241297511287046144?lan... [2] https://twitter.com/d_spiegel/status/1271696043739172864

stevenAthompson2y ago

Did you just cite twitter as if it were a reliable source for medical information?

*EDIT* Did you just cite a twitter post that links to some dudes blog as if it were a reliable source of medical information?

* EDIT to the EDIT * Did you notice that this dudes blog is PAID, and requires a subscription to access?

2 more replies

j / k navigate · click thread line to collapse