4 ms·

His analysis documented on this book A treatise on pneumonic plague, by Wu Lien-Teh https://wellcomelibrary.org/item/b19164415#?c=0&m=0&s=0&cv=0&z=-0.6558%2C-0

His analysis documented on this book A treatise on pneumonic plague, by Wu Lien-Teh https://wellcomelibrary.org/item/b19164415#?c=0&m=0&s=0&cv=0&z=-0.6558%2C-0.0892%2C2.03%2C1.4933 https://wellcomelibrary.org/item/b19164415#?c=0&m=0&s=0&cv=0... His mask sounds simpler than N95 masks, only replaced by the newer design during SARS period in 2013. By the way, anyone has the original design of Dr Wu's mask? Can we mass produce this design for everyone? We need it

richajak 7y ago
Found answer for my question if anyone is interested to do DIY at home page 393-394 This consists of two layers of gauze enclosing a flat oblong piece of absorbent cotton 6 inches by 4 inches. It can beeasily made by cutting the usual surgical gauze (9 inches wide), as supplied from the shops, into strips, each measuring 3 feet in length. Each strip is then doubled lengthwise so as to contain in the middle a flat piece of cottonwool measuring 4 inches by 6 inches. At either end of the gauze two cuts, each measuring 15 inches, are made. Thusturning the pad into a three-tail gauze bandage, with the central piece of wool for covering the respiratory entrance.The upper tail of one side should be passed round the side of the head above the ear and tied to the othercorresponding tail. The lowermost tail should in a similar manner be passed under the ear and tied to the one on theother side, while the middle tail should be passed over the crown of the head, so as to fix the pad and prevent it fromslipping down the neck
jdjriekfkf 7y ago
The secret ingredient in N95 masks (and surgical) is a very fancy modern material: melt-blown non-woven polypropylene. This is what makes a paper thin surgical mask way better than a thick cotton one.
- richajak 7y ago
  Totally agree, that's said most people cannot get surgical masks anymore, not to mention N95 masks. If we can learn the lesson from outbreak happened before modern tech invented, world would be a better place. We cannot produce or easily buy nanotech material used for N95 masks. However we can use whatever materials avail in our house easily. If need extra protection, add 2 layers of tissue between mask and face. Do not touch mask when you are outside. Stay away at least 2m from any human being. Do not touch anything outside. Immediately take shower and disinfect youself with 80p alcohol at home. :) hopefully most of us will not get infected, I do not want scenario in movie like Contagion or World War Z to happen for human race.

richajak 7y ago

Found answer for my question if anyone is interested to do DIY at home page 393-394 This consists of two layers of gauze enclosing a flat oblong piece of absorbent cotton 6 inches by 4 inches. It can beeasily made by cutting the usual surgical gauze (9 inches wide), as supplied from the shops, into strips, each measuring 3 feet in length. Each strip is then doubled lengthwise so as to contain in the middle a flat piece of cottonwool measuring 4 inches by 6 inches. At either end of the gauze two cuts, each measuring 15 inches, are made. Thusturning the pad into a three-tail gauze bandage, with the central piece of wool for covering the respiratory entrance.The upper tail of one side should be passed round the side of the head above the ear and tied to the othercorresponding tail. The lowermost tail should in a similar manner be passed under the ear and tied to the one on theother side, while the middle tail should be passed over the crown of the head, so as to fix the pad and prevent it fromslipping down the neck

jdjriekfkf 7y ago

The secret ingredient in N95 masks (and surgical) is a very fancy modern material: melt-blown non-woven polypropylene. This is what makes a paper thin surgical mask way better than a thick cotton one.

richajak 7y ago
Totally agree, that's said most people cannot get surgical masks anymore, not to mention N95 masks. If we can learn the lesson from outbreak happened before modern tech invented, world would be a better place. We cannot produce or easily buy nanotech material used for N95 masks. However we can use whatever materials avail in our house easily. If need extra protection, add 2 layers of tissue between mask and face. Do not touch mask when you are outside. Stay away at least 2m from any human being. Do not touch anything outside. Immediately take shower and disinfect youself with 80p alcohol at home. :) hopefully most of us will not get infected, I do not want scenario in movie like Contagion or World War Z to happen for human race.