Showing posts with label Covid-21. Show all posts
Showing posts with label Covid-21. Show all posts

Saturday, September 04, 2021

Bad Genes And Rogue Antibodies Make You Vulnerable To Covid

nature |  Antibodies that turn against elements of our own immune defences are a key driver of severe illness and death following SARS-CoV-2 infection in some people, according to a large international study. These rogue antibodies, known as autoantibodies, are also present in a small proportion of healthy, uninfected individuals — and their prevalence increases with age, which may help to explain why elderly people are at higher risk of severe COVID-19.

The findings, published on 19 August in Science Immunology1, provide robust evidence to support an observation made by the same research team last October. Led by immunologist Jean-Laurent Casanova at the Rockefeller University in New York City, the researchers found that around 10% of people with severe COVID-19 had autoantibodies that attack and block type 1 interferons, protein molecules in the blood that have a critical role in fighting off viral infections2.

“The initial report from last year was probably one of the most important papers in the pandemic,” says Aaron Ring, an immunologist at the Yale School of Medicine in New Haven, Connecticut, who was not involved in this work. “What they’ve done in this new study is really dig down to see just how common these antibodies are across the general population — and it turns out they’re astonishingly prevalent.”

The international research team focused on detecting autoantibodies that could neutralize lower, more physiologically relevant concentrations of interferons. They studied 3,595 patients from 38 countries with critical COVID-19, meaning that the individuals were ill enough to be admitted to an intensive-care unit. Overall, 13.6% of these patients possessed autoantibodies, with the proportion ranging from 9.6% of those below the age of 40, up to 21% of those over 80. Autoantibodies were also present in 18% of people who had died of the disease.

Casanova and his colleagues suspected that these devious antibodies were a cause, rather than a consequence, of critical COVID-19. There were hints that this might be the case — the group had previously found that autoantibodies were present in around 4 in 1,000 healthy people whose samples had been collected before the pandemic2. The team also found that individuals with genetic mutations that disrupt the activity of type 1 interferons are at higher risk of life-threatening disease3,4.

To examine this link further, the researchers hunted for autoantibodies in a massive collection of blood samples taken from almost 35,000 healthy people before the pandemic. They found that 0.18% of those between 18 and 69 had existing autoantibodies against type 1 interferon, and that this proportion increased with age: autoantibodies were present in around 1.1% of 70- to 79-year-olds, and 3.4% of those over the age of 80.

“There is a massive increase in prevalence” with age, Casanova says. “This largely explains the high risk of severe COVID in people in the elderly population.” He adds that these findings have clear clinical implications, and suggests that hospitals should be checking patients for these autoantibodies, as well as mutations implicated in blocking type 1 interferons. This could identify people who are more likely to become critically ill from COVID-19, helping physicians to tailor their treatment appropriately.

 

Saturday, August 21, 2021

mRNA Neo-Vaccinoids Damn Near Worthless At Preventing Covid-21 Infection

FT  |  A rise in vaccinated people becoming infected with coronavirus has cast doubt over the lasting efficacy of Covid-19 vaccines, according to new studies, including one that found protection gained from the BioNTech/Pfizer shot declined more rapidly than that from the AstraZeneca jab. An Oxford university study published on Thursday found that the efficacy of the Pfizer vaccine against symptomatic infection almost halved after four months, and that vaccinated people infected with the more infectious Delta variant had as high viral loads as the unvaccinated. Two research papers from the US and Qatar have also fuelled debate over the need for top-up booster shots as they found higher numbers of “breakthrough infections” than anticipated, even though protection against serious cases of the virus appears to hold. Natalie Dean, a biostatistics professor at Emory University, said the spread of the Delta variant had made it “a lot harder” to stop transmission. “The situation has changed with respect to how far we think vaccines can take us,” she said. “We’ve been brought back to a more modest — but still critical — goal: to prevent severe disease, hospitalisations and deaths.” 

The Oxford scientists showed vaccine efficacy falling since the Delta strain became dominant in the UK in May. While the Pfizer shot was more effective at first, by four to five months after the second dose its efficacy was roughly the same as AstraZeneca’s jab, as the protection offered by the latter has barely budged. The paper’s authors were not involved in the creation of the AstraZeneca vaccine, which originated at Oxford university. Tomas Hanke, professor of vaccine immunology at Oxford’s Jenner Institute, speculated that the AstraZeneca shot generates longer-lasting immunity because its spike protein sticks around for more time, promoting a bigger immune response. “When you deliver RNA, like the Pfizer vaccine, you deliver a finite number of mRNA molecules which are eventually cleared from the system,” he said. “But when you deliver the adenovirus, as AstraZeneca does, you deliver a template which then keeps producing these mRNAs that then produce the spike protein, so there’s no ceiling.” A preprint based on evidence collected at the Mayo Clinic hospital chain in the US state of Minnesota showed protection against infection fell from 91 per cent to 76 per cent between February and July for the vaccine made by Moderna, and from 89 per cent to 42 per cent for the Pfizer jab. 

Thursday, August 05, 2021

CDC Not Counting Vaccine Breakthrough Cases, So How They Know These Workers Were Unvaccinated?

NYTimes |  In late spring, the 142 nursing homes operated by the Good Samaritan Society hit a milestone that was unthinkable just four months earlier: Zero cases of Covid-19 across the whole company, from 900 at the peak of the pandemic.

The relief was short-lived.

The case count has ticked up again: It’s still below 100 among residents and staff, the company said, but includes many breakthrough cases of vaccinated residents testing positive. Then last week, two vaccinated residents died with Covid at the Good Samaritan Society-Deuel County nursing home in Clear Lake, South Dakota.

The company said it had pinpointed the cause of the spread there and at other of its facilities: The breakthroughs had happened in the same homes where unvaccinated staff were testing positive, seemingly carrying the virus into the home from the community.

“We fought this virus, and we were winning with the vaccine,” said Randy Bury, chief executive of the Good Samaritan Society, a nonprofit chain that operates in 24 states.

Late last month, the company became one of the largest long-term care chains in the country to order mandatory vaccines for staff, highlighting turmoil within an industry desperate to avoid a repeat of the devastation that swept through this highly vulnerable population.

After sharp drops in infections over the last several months, the number of Covid cases among U.S. nursing-home residents and staff roughly tripled from the week of July 4 to the week ending July 25, according to the Centers for Disease Control and Prevention. The agency’s data show that cases of Covid among residents had risen to 1,312, the highest figure reported since early March.

About 133,000 nursing home residents died of Covid over the course of the pandemic, although the death rate has plummeted in recent months with more than 80 percent of residents now vaccinated. Overall, Covid deaths among nursing home residents and staff members accounted for nearly one-third of the nation’s pandemic fatalities.

Growing calls for vaccine mandates among health care workers have gained urgency but also met resistance in the nursing home industry, where some homes say it will cost them staff members in an industry already plagued with high turnover. Only about 60 percent of nursing home staff members are vaccinated, and some states report an even lower rate, with less than half inoculated, according to the most recent government data.

As of the week ending July 25, Covid cases among nursing home staff members nationwide were also climbing, to 2,145, according to the C.D.C. data.

 

Wednesday, July 14, 2021

People Who've Had SARS-Cov2 Do Not Benefit From mRNA Therapeutic Jabs

medrxiv | Background The purpose of this study was to evaluate the necessity of COVID-19 vaccination in persons previously infected with SARS-CoV-2.

Methods Employees of the Cleveland Clinic Health System working in Ohio on Dec 16, 2020, the day COVID-19 vaccination was started, were included. Any subject who tested positive for SARS-CoV-2 at least 42 days earlier was considered previously infected. One was considered vaccinated 14 days after receipt of the second dose of a SARS-CoV-2 mRNA vaccine. The cumulative incidence of SARS-CoV-2 infection over the next five months, among previously infected subjects who received the vaccine, was compared with those of previously infected subjects who remained unvaccinated, previously uninfected subjects who received the vaccine, and previously uninfected subjects who remained unvaccinated.

Results Among the 52238 included employees, 1359 (53%) of 2579 previously infected subjects remained unvaccinated, compared with 22777 (41%) of 49659 not previously infected. The cumulative incidence of SARS-CoV-2 infection remained almost zero among previously infected unvaccinated subjects, previously infected subjects who were vaccinated, and previously uninfected subjects who were vaccinated, compared with a steady increase in cumulative incidence among previously uninfected subjects who remained unvaccinated. Not one of the 1359 previously infected subjects who remained unvaccinated had a SARS-CoV-2 infection over the duration of the study. In a Cox proportional hazards regression model, after adjusting for the phase of the epidemic, vaccination was associated with a significantly lower risk of SARS-CoV-2 infection among those not previously infected (HR 0.031, 95% CI 0.015 to 0.061) but not among those previously infected (HR 0.313, 95% CI 0 to Infinity).

Conclusions Individuals who have had SARS-CoV-2 infection are unlikely to benefit from COVID-19 vaccination, and vaccines can be safely prioritized to those who have not been infected before.

Summary Cumulative incidence of COVID-19 was examined among 52238 employees in an American healthcare system. COVID-19 did not occur in anyone over the five months of the study among 2579 individuals previously infected with COVID-19, including 1359 who did not take the vaccine.

Tuesday, May 11, 2021

Gain Of Function Program For Covid-21: Build Back Better!

Over the weekend I watched a very interesting discussion between Dutch virologist, Geest Vanden Bossche and Bret Weinstein. Vanden Bossche made exactly this point about using vaccinations in the middle of an epidemic – he points out that - this is the first time a major vaccination program has taken place while a pandemic is at its peak.

He particularly emphasized that ‘two shot’ vaccinations have a longer immunological ramp up time, giving the virus more time to evolve. The mRNA therapeutic program is nothing other than an active gain of function experiment on the virus at a global scale.

The real worries here are the following:

First, the breakthrough (mRNA therapeutic breach) cases are asymptomatic/mild now, but they will not be mild later in the year, as antibodies for the synthetic spike protein decline in those who received these shots.

Second, and most important, from the evolutionary perspective of the virus, its evolutionary “goal” is not just to survive, but to make as many copies of itself as possible. Milder cases tend to have less of the virus (yes, there are completely asymptomatic superspreaders that generate a huge amount of virus in their upper respiratory tracts, but in general, if Covid-21 can get past the upper respiratory tract and cause real damage, that means a lot more copies of the virus.) Clearly the evolutionary pressure is there for Covid-21 to evolve in that direction.

Whatever can escape the antibodies generated by the mRNA synthetic spike protein and lead to more replication will be selected for. That will mean a much more contagious and virulent virus (Covid-21_ just from that.) So far, immune escape has evolved hand in hand with stronger affinity for the ACE2 receptor, which directly translates into higher contagiousness and also elevated virulence as well. The likely mutations to come next have been identified in vitro (to be noted, in vitro evolution had already correctly identified the ones that characterize the current variants, so it has a good track record so far).

In vitro has also identified ways for it to get deadlier through a different mechanism – that is - shutting down innate immunity by inhibiting the interferon response. This second mutation is a key strategy that these viruses have evolved in their battle with bats’ immune systems.  There is some evidence that Covid-19 is actually not all that good at this compared to, for example, the first SARS virus from 2003. I suspect that this was a major reason why SARS-1 was much more lethal.

Can the mRNA therapeutic regimen select for a reversion back to that state, i.e. it goes in the direction of countering the immune system as a whole by becoming better at overcoming the innate arm of the immune system. When the adaptive arm of Covid-19 has been strengthened by mRNA therapeutics, the evolutionary potential for a much more contagious and lethal Covid-21 may become evident?

I don’t have an answer, but I sure hope that it does not.

The mRNA therapeutic approach runs the risk of breeding something much more contagious and deadly Covid-21. And because it may well happen in stages, there is also the risk of it becoming gradually normalized, just as the current level of death has become normalized.  I remember learning about gain of function research reading Annie Jacobson's Operation Paperclip. So it's not as if potential outcomes aren't well understood.

So not only do we have lying officials that did everything possible to help the spread of an aerosol pathogen, now those same officials are running a playbook for creating more virulent strains taking us from Covid-19 to Covid-21. Meanwhile, we're drowned in and overwhelmed by dueling narratives Outside of what you read here, there's scant information to be gotten about gain of function mutations and the rate of infection of those whose mRNA therapeutic injections have been breached.

"Trust the science" pretenders like the frightening Dr. Kavita (force the injections) Patel are pretending that shots will get the virus under control - and they won’t. mRNA therapeutic jabs won't even get degenerating public health care systems under control. So, not only does this grand Covid-21 gain of function experiment have the potential to be even more deadly, nary any of the deep seated issues with any of the impacted health care systems have been fixed.

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