222納米燈殺菌有效卻一年只賣幾百臺，瓶頸不是技術

核心論點 · 時間戳為按文稿位置估算

原話 · 已逐字校驗

So on a chemical, biological level, the special thing about far UVC is it is absorbed by the DNA and RNA of pathogens, as well as by essentially all proteins. And this is very important, because the fact that it's so heavily absorbed by proteins is a thing that makes it much safer than other germicidal UV wavelengths.

在化學/生物層面，far UVC 的特殊之處在於它會被病原體的 DNA 和 RNA 吸收，也會被幾乎所有蛋白質吸收。被蛋白質強烈吸收這一點，正是它比其他殺菌 UV 波長安全得多的原因。

Vivian0:58

Essentially, it's not good for living cells to be exposed to UVC of any wavelength. But the difference is that humans have a 20-micron-thick layer of dead skin cells that are chock-full of proteins that essentially absorb all far UVC.

本質上，任何波長的 UVC 暴露對活細胞都不好。但差別在於人類有約 20 微米厚的死皮細胞層，充滿蛋白質，幾乎吸收所有 far UVC。

Vivian3:25

One of the big benefits of it being more effective than sunlight as a disinfectant is that you can actually use it at pretty low power levels. So the emitters we're using, they're putting out like 100 milliwatts, right? Which is really not a lot.

它作為消毒劑比陽光更有效的一大好處是，可以在很低的功率下使用。我們用的發射器只有約 100 毫瓦，真的不多。

Misha9:24

So there's going to be some critical coverage point within a community where the suppression really takes off. And we have modeling on this, but yeah, I think it's really, really uncertain.

某個社區內會有一個臨界覆蓋率，真正抑制傳播要在過線後才會起飛。我們有模型，但我認為這非常不確定。

Vivian21:48

And also I should point out that we have some really encouraging results on tuberculosis specifically. There's a trial going on in South Africa that already has preliminary results, and they're seeing 90% transmission suppression in these TB wards.

我還要指出，肺結核方面有一些非常令人鼓舞的結果。南非正在進行的試驗已有初步結果，這些 TB 病房的傳播抑制率達到 90%。

Vivian23:24

No, I definitely think that's a huge benefit. I also think because it's part of the built environment, you need a lot fewer people to be involved in the prevention process, right?

不，我絕對認為這是一個巨大好處。而且因為它是建成環境的一部分，需要參與預防過程的人少得多，對吧？

Misha32:49

And if a certain amount of infection prevention gets written into building codes, and then these are broadly adopted in whatever the authority having jurisdiction is — that might be on the state level or on the county level — this means that these interventions just get built into buildings on a ten-year renovation cycle.

如果一定量的感染預防被寫進建築規範，並且被有管轄權的當局廣泛採納，這些干預就會在十年裝修週期內自然進入建築。

Vivian34:23

So I would much rather my kid catch whatever it is that's going around at ten than at five, and I'd rather it happen at five than at one. But I'd really rather it just not happen. There's just no benefit.

所以我寧願我的孩子十歲而不是五歲感染正在流行的東西，五歲而不是一歲。但我更希望乾脆不得病。沒有任何好處。

Vivian56:09

數字與實體

術語

far UVC遠紫外線C段

200–235 納米紫外線，主用 222 納米，可被蛋白質吸收，殺菌且對人體表層安全。

krypton chloride excimer lamp氯化氪準分子燈

當前 far UVC 主要發射器，生產工藝比 LED 複雜，需氫氟酸氣體。

ASHRAE 241ASHRAE 241 標準

美國暖通空調工程師協會制定的室內感染預防標準，尚未被廣泛納入建築規範。

R0基本再生數

一個感染者平均傳染的人數；大於 1 會指數擴散，小於 1 會自然消退。

hygiene hypothesis衛生假說

認為太乾淨導致過敏哮喘；現代版本認為免疫訓練來自環境細菌，不需要真得病。

收聽指南