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stickdog99 » Sat Mar 27, 2021 8:45 am wrote:https://nature.com/articles/d41586-021-00728-2
Five reasons why COVID herd immunity is probably impossible
Even with vaccination efforts in full force, the theoretical threshold for vanquishing COVID-19 looks to be out of reach.
According to the CDC, the survival from Covid (with inflated stats) is as follows: (under 20) 99.997%, (29-49) 99.98%, (50-69) 99.5% and (over 70), 94.6%.
Sunlight renders coronavirus inactive 8 TIMES faster than predicted, says new study
Researchers have found that the coronavirus is inactivated by sunlight as much as eight times faster in experiments than predicted by current theoretical modelling, providing a glimmer of hope in turning the tide on the pandemic.
UC Santa Barbara assistant professor of mechanical engineering Paolo Luzzatto-Fegiz conducted an analysis of 2020 studies exploring the effects of different forms of UV radiation on the SARS-CoV-2 and found a significant discrepancy.
As with all electromagnetic radiation, UV falls on a spectrum, with longer-wave UVA reacting differently with parts of DNA and RNA than other mid-range UVB waves contained in sunlight, which kill microbes and cause sunburn in humans.
Short-wave UVC radiation has previously been shown to deactivate viruses such as SARS-CoV-2, which is responsible for Covid-19, but this section of the UV spectrum is deflected away by the Earth’s ozone layer.
A July 2020 experimental study tested the power of UV light on SARS-CoV-2, contained in simulated saliva, and found the virus was inactivated in under 20 minutes.
However, a theory published a month later suggested sunlight could achieve the same effect, which didn’t quite add up. This second study concluded that SARS-CoV-2 was three times more sensitive to UV radiation in sunlight than the influenza A virus.
The vast majority of coronavirus particles were rendered inactive within 30 minutes of exposure to midday summer sunlight, whereas the virus could survive for days under winter sunlight.
“The experimentally observed inactivation in simulated saliva is over eight times faster than would have been expected from the theory,” Luzzatto-Feigiz and his team said. “So, scientists don’t yet know what’s going on.”
The team suspects that, as the UVC doesn’t reach the Earth, instead of directly attacking the RNA, the long-wave UVA in sunlight interacts with molecules in the virus’ environment, such as saliva, which speeds up the inactivation, in a process witnessed previously in wastewater treatment.
The findings suggest UVA emitters could be added to equipment such as air filtration systems to provide a cheap and energy-efficient means of reducing the spread of viral particles. Masks and social distancing would more than likely still be required, but such UV-based interventions could be of some benefit as nations struggle with recurring waves of the pandemic despite vaccination efforts.
PufPuf93 » 04 Apr 2021 18:24 wrote:
Vitamin D is unquestionably important in the immune system, not open to question at all. If one has a strong immune system, cv19 will have less impact on average; a person in good health bears less risk on average of severe or long haul consequences of infection and likely less tendency to pass on the virus. Theses facts about vitamin D and the immune system is obvious to most medical practitioners or researchers or people with a modicum of scientific literacy. The meta-study you cite confirms the positive effects of vitamin D on the immune system in the specific case of cv19 infection. The researchers have confirmed the positive effects of vitamin D on the immunes system ability to cope with cv19 and more importantly made estimates to quantify the impact. The researchers expected the results that were revealed. But Vitamin D does not cure nor prevent cv19.
stickdog99 » Sun Apr 04, 2021 12:52 pm wrote:PufPuf93 » 04 Apr 2021 18:24 wrote:
Vitamin D is unquestionably important in the immune system, not open to question at all. If one has a strong immune system, cv19 will have less impact on average; a person in good health bears less risk on average of severe or long haul consequences of infection and likely less tendency to pass on the virus. Theses facts about vitamin D and the immune system is obvious to most medical practitioners or researchers or people with a modicum of scientific literacy. The meta-study you cite confirms the positive effects of vitamin D on the immune system in the specific case of cv19 infection. The researchers have confirmed the positive effects of vitamin D on the immunes system ability to cope with cv19 and more importantly made estimates to quantify the impact. The researchers expected the results that were revealed. But Vitamin D does not cure nor prevent cv19.
OK. Can you tell me what percentage of patients under 70 who are hospitalized because of COVID-19 also have a Vitamin D deficiency?
https://www.medpagetoday.com/infectious ... id19/90530
More striking was that vitamin D deficiency was found in 97% of severely ill patients who required ICU admission but in only 33% of asymptomatic cases, suggesting that low levels are a necessary component of severe COVID-19. This is one of numerous studies this year establishing the correlation of low vitamin D levels with an aggravated course of COVID-19, as a meta-analysis by Pereira and colleagues reveals.
https://www.cidrap.umn.edu/news-perspec ... k-patients
https://www.news-medical.net/news/20210 ... ation.aspx
It’s time to unplug the sanitizing robots and put away the bottles of Clorox that seem to line the entrances to every school, restaurant and supermarket wanting to advertise its safety protocols. While such protocols may be reassuring to an anxious populace, they are not necessary, says a revised guidance issued on Monday by the Centers for Disease Control and Prevention.
“It is possible for people to be infected through contact with contaminated surfaces or objects (fomites), but the risk is generally considered to be low,” the new CDC guidance says, estimating that the chance of contracting the coronavirus through surface transmission is lower than 1 in 10,000.
The coronavirus is spread almost exclusively by airborne and aerosolized particles, as scientists have known for months. Despite scientists’ growing certitude about how the pathogen is transmitted, many establishments have continued to insist on strict sanitization protocols. In some school districts, for example, classrooms close for full-day “deep cleaning.”
The persistence of such practices has led to the advent of a derisive term — “hygiene theater” — to describe rituals that appear to do little to stop the virus from spreading. It is not clear if the CDC’s new guidance will lower the curtain on those theatrics, given how entrenched some of those practices have become.
“If we took half the effort that’s being given to disinfection, and we put it on ventilation, that will be huge,” University of Colorado atmospheric chemist Jose-Luis Jimenez told the scientific publication Nature for an article published last month.
Prevention -- by fortifying one's natural immunity -- is the best defense we can expect, Puf. There is no 'cure' for any virus.
The larger issue underscored by these -- and other --findings is that there are a number of readily accessible, and relatively safe, treatments available that are generally suppressed, in contrast to the hard push for vaccination (via 'vaccines' that have yet to be FDA approved, have less than a year of trials, and have known side effects that include near-term death), which may soon be outright mandated --- all for a virus the remains highly survivable (over 99% for most humans), and for many infected, mild or no symptoms.
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