cptqueeg
Idaho
Senior Member
Joined: 04/11/2020
View Profile
|
08:41 AM EST, 02/02/2021 (MT Newswires) -- Prime Minister Justin Trudeau is expected to announce Tuesday the makings of an agreement to produce COVID-19 vaccines within Canada, The Canadian Press is reporting
Industry Minister Francois-Phillipe Champagne told The Canadian Press the government is moving quickly to start making COVID-19 vaccines itself, instead of being entirely reliant on foreign production for the most sought-after product in the world.
According to the report, the deal could help Trudeau "tamp down the political headache" caused by Canada's skeletal vaccine production capacity. The report said Canada's inability to produce any COVID-19 vaccines at home has left the country at the mercy of foreign governments who could at any time slam the doors shut to vaccine exports until their own people are vaccinated. That risk, the report added, became ever more real this week as Europe's new export controls on vaccines takes hold, putting at risk Canada's entire supply of COVID-19 vaccines.
|
monkey44
Cape Cod, MA and Central Fla
Senior Member
Joined: 11/12/2002
View Profile
 Offline
|
A pretty long but very detailed explanation about how mRNA vaccines work, and the safety precautions in manufacturing and testing. Worth the time. Feel free to make this clickable ![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/smile.gif "smile") Tech dumb Monkey
https://health.mil/News/Articles/2021/02/01/DOD-experts-explain-The-science-behind-the-COVID-19-vaccines?utm_medium=govdelivery&utm_source=email
Monkey44
Cape Cod Ma & Central Fla
Chevy 2500HD 4x4 DC-SB
2008 Lance 845
Back-country camping fanatic
|
Monaramblee
Canada
Full Member
Joined: 05/18/2020
View Profile
|
The Canadian made vacines will be a bit late to the party but will come in handy if we need the vacine annually.
2008 Holiday rambler Vacationer XL
340 HP Cummins
|
Boon Docker
Mountain Foothills of Southern Alberta
Senior Member
Joined: 10/30/2015
View Profile
|
monkey44 wrote:A pretty long but very detailed explanation about how mRNA vaccines work, and the safety precautions in manufacturing and testing. Worth the time. Feel free to make this clickable Tech dumb Monkey
https://health.mil/News/Articles/2021/02/01/DOD-experts-explain-The-science-behind-the-COVID-19-vaccines?utm_medium=govdelivery&utm_source=email
Clickable Link
|
silversand
Montreal
Senior Member
Joined: 09/12/2004
View Profile
|
The science journal, Nature Research in its Scientific Report, shows in its Inactivation of human coronaviruses after exposure to 222 nm light in aerosols infectivity assay results section, that, "The severity of the 2020 COVID-19 pandemic warrants the rapid development and deployment of effective countermeasures to reduce indoor person-to-person transmission. We have developed a promising approach using single-wavelength far-UVC light at 222nm generated by filtered excimer lamps, which inactivates airborne viruses without inducing biological damage in exposed human cells and tissue11–18. The approach is based on the biophysically-based principle that far-UVC light, because of its very limited penetration in biological materials... " Read the entire research paper here-->
Why this technology has not been fast-tracked last year into every public facility, government building, and every hospital on Earth is a mystery to me. I know it has been installed into a handful of airports in the USA (and, one in Canada: Vancouver international), and in a handful of hospitals (John Hopkins, being one). The cost to install this is miniscule in comparison to the billions (probably trillions) that will be lost to the economy AND, the millions (tens of millions?) of human lives lost to Covid (and, the flu!) over the next 2 to 5 years.
Silver
2004 Chevy Silverado 2500HD 4x4 6.0L Ext/LB Tow Package 4L80E Michelin AT2s| Outfitter Caribou
|
|
|
BCSnob
Middletown, MD
Senior Member
Joined: 02/23/2002
View Profile
|
How should 222nm UV light disinfection be employed inside buildings to disinfect while minimizing the damage it will do to the interior building materials never designed to withstand the damage caused by UVC? (UVC degrades polymers/plastics)
|
silversand
Montreal
Senior Member
Joined: 09/12/2004
View Profile
|
BCSnob wrote:How should 222nm UV light disinfection be employed inside buildings to disinfect while minimizing the damage it will do to the interior building materials never designed to withstand the damage caused by UVC? (UVC degrades polymers/plastics)
....I am unaware of any damage that could occur to polymers and plastics with 222nm continuous-use TLV. The excimer filtered output would be set to FDA threshold limit value (see the link to above Nature research) far below any values that could damage human tissue let alone plastics. In addition, ASDUs (air and surface disinfection units) have been used for years in all manner of environments, continuously, to disinfect all manner of man-made materials, including medical devices.
Can you point to any materials research that demonstrates that excimer-produced far ultraviolet filtered ultra narrow-band 222nm output at 1.2 to 1.7 mJ/cm2 of 222nm light degrades "plastics" or polymerized materials faster than said plastic's natural environmental oxidation?
|
Geo*Boy
Unknown
Senior Member
Joined: 04/27/2020
View Profile
|
Monaramblee wrote:The Canadian made vacines will be a bit late to the party but will come in handy if we need the vacine annually.
It was my understanding that Canada does not have the ability to manufacture a vaccine at the present time and must rely on other countries for the vaccine.
|
silversand
Montreal
Senior Member
Joined: 09/12/2004
View Profile
|
Geo*Boy wrote:It was my understanding that Canada does not have the ability to manufacture a vaccine at the present time and must rely on other countries for the vaccine.
Correct. Montreal has a facility called the Royalmount. It is a Canadian Federal Government facility for experimentation and not a vaccine manufacturing facility, and run by the Canadian National Research Council (NRC). Retrofits are being done to upgrade the facility to vaccine production capability. The Royalmount presently does cell culturing, microbial fermentation, molecular modeling, and antibody production (bioprocesses engineering). And, primarily human health therapeutics (pure) research. So, it made sense to rapidly convert this facility to vaccine manufacturing.
the Royalmount-->
|
BCSnob
Middletown, MD
Senior Member
Joined: 02/23/2002
View Profile
|
Most of the research on UV degradation of polymers has been focused on the UV wavelengths from solar radiation that make it to the earth; higher energy UVC wavelengths like 222nm are absorbed in the atmosphere and has therefore not been included in investigations of polymer degradation by sunlight. However, polymers do absorb 222nm light and can therefore undergo UV induced changes. Below are a few references to studies using 222nm light (KrCl excimer lamps) to photochemically change polymers. The FDA limit is set based upon the irradiance of 222nm that can be "filtered" by the dead skin cells and tears on the eyes preventing this high energy wavelength of light reaching more sensitive cells. Damage cased by 222nm to dead skin cells and tears is no important to us. Damage to polymers and the possible impact of the degradation products on us is unknown. Ablation (vaporization) of polymer surfaces is one of the main uses I have read for 222nm excimer light. Will the irradiance used for sterilization lead to polymer ablation? What are the products of this ablation and how would they impact human health?
Drastic decrease of carbonyl group after the loss of ether in PADC exposed to 222nm UV photons
Radiation Physics and Chemistry Volume 157, April 2019, Pages 60-64
Modification of polymers with UV excimer radiation from lasers and lamps
Journal of Adhesion Science and Technology Volume 8, 1994 - Issue 10
Degradation of Bisphenol A in an Aqueous Solution by a Photo-Fenton-Like Process Using a UV KrCl Excilamp
Int. J. Environ. Res. Public Health 2021, 18(3), 1152
I'm not saying the use of 222nm for sterilization should be avoided; I am suggesting that implementation of this in public spaces should be carefully thought out so as to avoid unintended consequences. A good example of its use might be interior of the HVAC air return ducts.
Did you know that titanium dioxide is an efficient photocatalyst even when TiO2 (white pigment) is in wall paint?
* This post was
last
edited 02/04/21 08:27am by BCSnob *
View edit history
|
|
|
