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 > Your search for posts made by 'BCSnob' found 193 matches.

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RE: 2019–20 CORONAVIRUS PANDEMIC POSTINGS

This commentary on sunlight not likely being effective at destroying SARS-cov-2 was published in the peer reviewed journal Lancet. Solar ultraviolet radiation sensitivity of SARS-CoV-2 This publication estimated the dose of UVC needed to inactive a SARS virus. Estimating UV-C Sterilization Dosage for COVID-19 Pandemic Mitigation Efforts Conducting a curve fitting analysis on SARS-CoV-1 survivorship data obtained from existing literature, the approximate UV-C dosage required to inactivate the virus below assay limit of detection was found to be 36144 J/m2 (? 5-log). Using this dosage as a benchmark for UVGI applications against SARS-CoV-2, a benchmark minimum exposure time can be determined by t?(1.5× 106) ?·(r2/P), where r is the distance from the UV-C source to the sample surface, P is the wattage of the germicidal bulb, and t is expressed in seconds. This amounts to at least 2 hours for a 15 W UV-C bulb placed 6 inches from a disinfecting surface. UVC works to inactive viruses by being mutagenic; UVC damages RNA and DNA.
BCSnob 05/26/20 11:08am Around the Campfire
RE: Protecting your trees

Tell me when was the last time you saw an American Chestnut?every year when we visit a sheep/cattle farm in central VA. They planted resistant American chestnuts many years ago. I recall the elm lined streets in the Chicago suburbs from my childhood. We planted resistant elms at our previous gone; we will eventually plant resistant elms on our current farm.
BCSnob 05/25/20 05:30pm Around the Campfire
RE: Protecting your trees

over the past few years we have watched all the ash die around us; some very large trees. There are now down logs and stands of dead trees; ash was up to 25% of the trees in the forests.
BCSnob 05/24/20 05:35am Around the Campfire
RE: Canada/US Border still shut...

Life must be “interesting” in Derby Line VT & Stanstead QB where the border runs through buildings. The Only Wall Between These Border Towns Is a Row of Potted Plants
BCSnob 05/22/20 04:13pm General RVing Issues
RE: Canada/US Border still shut...

'Minuscule' is what a mask does for you or others re viruses. Look up the sizes. 1. It’s not the size of the virus that matters but the size of the droplets that carry the virus 2. Droplets are propelled away by the force of the breath that the droplets are in. This is where the 6’ social distancing recommendation comes from. If you reduce the force of the breath (by slowing it with a mask) you reduce the distance the virus containing droplets will travel. Some of the droplets will absorb in the mask reducing the amount of droplets traveling outward.
BCSnob 05/21/20 06:43am General RVing Issues
RE: Canada/US Border still shut...

Is a mask worn around your neck (not over your mouth and nose) just a fashion accessory?
BCSnob 05/21/20 04:39am General RVing Issues
RE: Canada/US Border still shut...

Just curious... you know that wearing non surgical masks to prevent the spread of a virus is about as effective as chain link fence prevent the spread of mosquitos, right? In fact, studies have shown that masks that are saturated from breathing are actually MORE likely to harbor the virus because of the humid warm environment on the mask? What studies? This is the only one on non-surgical masks I can find. Invitro filtration efficiency for selected face masks to bacteria with a size smaller than SARS-CoV-2 respiratory droplet This study suggests double cloth masks are effective at filtering exhaled virus containing droplets. Here's a paper aggregating several studies about the effectiveness of masks for preventing respiratory virus transmission. https://www.researchgate.net/publication/340570735_Masks_Don't_Work_A_review_of_science_relevant_to_COVID-19_social_policy You really should read the linked articles in this non-peer reviewed literature summary. The linked studies are about masks preventing the wearer from getting sick; not about about masks preventing sick people from spreading viruses. Read this peer reviewed report Respiratory virus shedding in exhaled breath and efficacy of face masks which assessed the efficacy of surgical mask use by patients to prevent them from spreading virus droplets.
BCSnob 05/20/20 06:34pm General RVing Issues
RE: Canada/US Border still shut...

Just curious... you know that wearing non surgical masks to prevent the spread of a virus is about as effective as chain link fence prevent the spread of mosquitos, right? In fact, studies have shown that masks that are saturated from breathing are actually MORE likely to harbor the virus because of the humid warm environment on the mask? What studies? This is the only one on non-surgical masks I can find. Invitro filtration efficiency for selected face masks to bacteria with a size smaller than SARS-CoV-2 respiratory droplet This study suggests double cloth masks are effective at filtering exhaled virus containing droplets.
BCSnob 05/20/20 12:52pm General RVing Issues
RE: Canada/US Border still shut...

Fact: Canada and USA are running the same number of tests per Capita; Canada has a lower positive test rate per Capita than the USA. Why would Canada want to allow a more infected herd to cross their border to seed more hotspots within their herd?
BCSnob 05/20/20 10:47am General RVing Issues
RE: 2019–20 CORONAVIRUS PANDEMIC POSTINGS

Can you put a price on COVID-19 options? Experts weigh lives versus economics Rough estimates by Economist Sergio Rebelo to cost shutdown vs deaths His initial modeling efforts showed that even a yearlong lockdown makes economic sense, to allow time for a vaccine to be developed. The pause would shrink the economy by approximately 22%—a cost of $4.2 trillion. By comparison, the model shows that without containment measures, the economy would contract by about 7% over that year—but as many as 500,000 additional lives would be lost, which translates into a loss of roughly $6.1 trillion. Containing COVID-19 Will Devastate the Economy. Here’s the Economic Case for Why It’s Still Our Best Option. Economics vs. Epidemiology: Quantifying the Trade-Off
BCSnob 05/06/20 08:41am Around the Campfire
RE: 2019–20 CORONAVIRUS PANDEMIC POSTINGS

The results of NY State’s seroprevalence survey broken down by region provides insight on how non-uniformly the spread of this virus has been. As high as 19.9% in NYC As low as 1.2% in North Country Amid Ongoing COVID-19 Pandemic, Governor Cuomo Announces Results of Completed Antibody Testing Study of 15,000 People Showing 12.3 Percent of Population Has COVID-19 Antibodies
BCSnob 05/05/20 02:19pm Around the Campfire
RE: 2019–20 CORONAVIRUS PANDEMIC POSTINGS

Lock downs do not mean people are not crossing paths allowing transmission of this infection which may be easier now. Preprint of Source study Spike mutation pipeline reveals the emergence of a more transmissible form of SARS-CoV-2 News article on study Scientists say a now-dominant strain of the coronavirus appears to be more contagious than original
BCSnob 05/05/20 09:44am Around the Campfire
RE: 2019–20 CORONAVIRUS PANDEMIC POSTINGS

^ Isn't that weird that we are staying pretty steady as every other developed country is seeing a decline? The USA is a large country geographically; as the earlier “hot spots” start seeing declines in cases new “hot spots” are emerging with increasing cases. These can combine for a national rate of cases holding at a plateau. The virus did not hit everyplace within the USA at the same time; it is spreading across the country starting in diverse urban areas and now moving into more rural areas carried by travelers (early spreaders include business executives, spring breakers, funeral attendees, mega church attendees, choir members, etc).
BCSnob 05/05/20 07:02am Around the Campfire
RE: Coronavirus

Did your source indicate what test method (rt-PCR vs serology) was used to determine the pug was positive for SARS-cov-2?
BCSnob 04/28/20 02:32pm RV Pet Stop
RE: 2019–20 CORONAVIRUS PANDEMIC POSTINGS

California is reporting a 0.03% Death rate for Coronavirus that mirrors a normal flu season. What is the source of the 0.03% death rate and how was it calculated? (Perhaps Drs Dan Erickson and Artin Massihi from Bakersfield; read this) 658 influenza caused deaths in CA during 2019- 2020 flu season California Influenza Surveillance Program 1,755 Covid-19 caused deaths in CA up through April 26, 2020 (and still counting) California Department of Public Health The CA Public Health posted numbers indicate Covid-19 is already 2.7x more deadly than this year’s seasonal flu and still getting worse.
BCSnob 04/28/20 08:40am Around the Campfire
RE: 49th anniversary

There are more in a diamond saw blade.
BCSnob 04/27/20 09:41am Around the Campfire
RE: 2019–20 CORONAVIRUS PANDEMIC POSTINGS

The above is interesting reading, but does not contain any research related to the current virus. Also, be sure to read "Harmful effects" in the article. As of now, if anyone has current research pro/con related to UV and the Corona Virus from any reputable research agency it is welcomed. One of many studies on using UV to decontaminate the limited supply of N95 masks for reuse. Assessment of N95 respirator decontamination and re-use for SARS-CoV-2 Robert J. Fischer1, Dylan H. Morris2, Neeltje van Doremalen1, Shanda Sarchette1, M. Jeremiah Matson1 Trenton Bushmaker1, Claude Kwe Yinda1, Stephanie N. Seifert1, Amandine Gamble3, Brandi N. Williamson1, Seth D. Judson4, Emmie de Wit1, James O. Lloyd-Smith3, Vincent J. Munster1 1. 2. 3. 4. National Institute of Allergy and Infectious Diseases, Hamilton, MT Princeton University, Princeton, NJ University of California, Los Angeles, Los Angeles, CA University of Washington, Seattle, WA
BCSnob 04/26/20 08:28pm Around the Campfire
RE: 2019–20 CORONAVIRUS PANDEMIC POSTINGS

There is nothing new about using UV for killing bacteria and viruses. It has and is being used for treating well water for years. I had a UV water system in a prior home I owned and it did a great job killing harmful bacteria. Sunlight contains UV and is limited or it would kill plants and animals if it had a higher concentration. Even its lower radiation level causes skin cancer for some people. Also it purifies mountain water streams as well, making it safer to drink directly from a high mountain stream. Many pioneers, trappers, Indians, and others new that. It makes it easier to understand that it could purify air handling systems as well. Here is one vendor: https://www.skillingsandsons.com/blog/the-pros-and-cons-of-using-ultraviolet-rays-for-water-treatment This is the new knowledge about uvc (from my second link above) We have previously shown that 207-nm ultraviolet (UV) light has similar antimicrobial properties as typical germicidal UV light (254 nm), but without inducing mammalian skin damage. The biophysical rationale is based on the limited penetration distance of 207-nm light in biological samples (e.g. stratum corneum) compared with that of 254-nm light. Here we extended our previous studies to 222-nm light and tested the hypothesis that there exists a narrow wavelength window in the far-UVC region, from around 200–222 nm, which is significantly harmful to bacteria, but without damaging cells in tissues. Getting just this narrow region of the UVC wavelengths would require specialized equipment. The first link in my post above reported 222nm from an excimer laser killed H1N1 influenza virus.
BCSnob 04/26/20 07:23pm Around the Campfire
RE: 2019–20 CORONAVIRUS PANDEMIC POSTINGS

Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseases Germicidal Efficacy and Mammalian Skin Safety of 222-nm UV Light
BCSnob 04/26/20 04:22pm Around the Campfire
RE: 2019–20 CORONAVIRUS PANDEMIC POSTINGS

Do you understand that the cloth masks we are being told to wear are not intended to protect the wearer but are intended to protect everyone one else from the wearer? CDC: How to Wear a Cloth Face Covering CDC recommends wearing cloth face coverings in public settings where other social distancing measures are difficult to maintain (e.g., grocery stores and pharmacies), especially in areas of significant community-based transmission. CDC also advises the use of simple cloth face coverings to slow the spread of the virus and help people who may have the virus and do not know it from transmitting it to others. Cloth face coverings fashioned from household items or made at home from common materials at low cost can be used as an additional, voluntary public health measure. A cluster randomised trial of cloth masks compared with medical masks in healthcare workers The rates of all infection outcomes were highest in the cloth mask arm, with the rate of ILI statistically significantly higher in the cloth mask arm (relative risk (RR)=13.00, 95% CI 1.69 to 100.07) compared with the medical mask arm. Cloth masks also had significantly higher rates of ILI compared with the control arm. An analysis by mask use showed ILI (RR=6.64, 95% CI 1.45 to 28.65) and laboratory-confirmed virus (RR=1.72, 95% CI 1.01 to 2.94) were significantly higher in the cloth masks group compared with the medical masks group. Penetration of cloth masks by particles was almost 97% and medical masks 44%.
BCSnob 04/26/20 02:34pm Around the Campfire
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