ISIS chief Abu Bakr al-Baghdadi ill after assassin ‘poisons' food: Report

October 4, 2016

Baghdad, Oct 4: The IS terrorist group ringleader was reportedly seriously ill after having his food poisoned by an assassin, a media report said.

abu-bakrMeals prepared for Baghdadi and three other commanders of the terrorist organisation were allegedly poisoned in Nineveh's Be'aaj district, the Daily Mail reported on Monday.

It quoted an Iraqi news agency as saying that four militants, including Baghdadi, were suffering from “severe poisoning” and “have been transferred to an unknown location under strict measures”.

The IS terror group has reportedly launched a campaign of arrests to track down those responsible for poisoning the food.

The identities of the three other commanders is unknown.

Baghdadi is credited with transforming the breakaway al-Qaeda group and turning it into the independent IS group that is arguably the most powerful and wealthiest jihadi organisation in the world.

Al-Baghdadi's movements are known only by his inner circle, and the Caliph, as he is known to his followers, is constantly on the move, changing locations in Iraq and Syria to avoid airstrikes.

Under the leadership of Baghdadi, the group spearheaded a militant offensive that expanded into Syria in 2013 and overran much of Iraq's Arab heartland.

Baghdadi has been wounded multiple times in air strikes and been reported dead, but has re-surfaced each time.

Earlier this year, there were reports he had been killed by US-led coalition air strikes, but they turned out to be inaccurate, the Daily Mail reported.

Baghdadi — whose real name is Ibrahim Awad Ibrahim — is thought to have been born in Samarra, north of Baghdad, in 1971.

In October 2011, the US officially designated Baghdadi as “terrorist” and offered a $10 million reward for information leading to his capture or death.

Under Baghdadi's leadership, IS militants have shocked the world with their sadistic beheadings of captured foreign journalists and civilians.

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Agencies
August 9,2020

When researcher Monica Gandhi began digging deeper into outbreaks of the novel coronavirus, she was struck by the extraordinarily high number of infected people who had no symptoms.

A Boston homeless shelter had 147 infected residents, but 88% had no symptoms even though they shared their living space. A Tyson Foods poultry plant in Springdale, Ark., had 481 infections, and 95% were asymptomatic.

Prisons in Arkansas, North Carolina, Ohio and Virginia counted 3,277 infected people, but 96% were asymptomatic.

During its seven-month global rampage, the coronavirus has claimed more than 700,000 lives. But Gandhi began to think the bigger mystery might be why it has left so many more practically unscathed.

What was it about these asymptomatic people, who lived or worked so closely to others who fell severely ill, she wondered, that protected them? Did the "dose" of their viral exposure make a difference? Was it genetics? Or might some people already have partial resistance to the virus, contrary to our initial understanding?

Efforts to understand the diversity in the illness are finally beginning to yield results, raising hope that the knowledge will help accelerate development of vaccines and therapies - or possibly even create new pathways toward herd immunity in which enough of the population develops a mild version of the virus that they block further spread and the pandemic ends.

"A high rate of asymptomatic infection is a good thing," said Gandhi, an infectious-disease specialist at the University of California at San Francisco. "It's a good thing for the individual and a good thing for society."

The coronavirus has left numerous clues - the uneven transmission in different parts of the world, the mostly mild impact on children. Perhaps most tantalizing is the unusually large proportion of infected people with mild symptoms or none at all. The Centers for Disease Control and Prevention last month estimated that rate at about 40%.

Those clues have sent scientists off in different directions: Some are looking into the role of the receptor cells, which the virus uses to infiltrate the body, to better understand the role that age and genetics might play. Others are delving into masks and whether they may filter just enough of the virus so those wearing them had mild cases or no symptoms at all.

The theory that has generated the most excitement in recent weeks is that some people walking among us might already have partial immunity.

When SARS-CoV-2, the technical name of the coronavirus that causes the disease covid-19, was first identified on Dec. 31, 2019, public health officials deemed it a "novel" virus because it was the first time it had been seen in humans who presumably had no immunity from it whatsoever. There's now some very early, tentative evidence suggesting that assumption might have been wrong.

One mind-blowing hypothesis - bolstered by a flurry of recent studies - is that a segment of the world's population may have partial protection thanks to "memory" T cells, the part of our immune system trained to recognize specific invaders. 

This could originate from cross-protection derived from standard childhood vaccinations. Or, as a paper published Tuesday in Science suggested, it could trace back to previous encounters with other coronaviruses, such as those that cause the common cold.

"This might potentially explain why some people seem to fend off the virus and may be less susceptible to becoming severely ill," National Institutes of Health Director Francis Collins remarked in a blog post this past week.

On a population level, such findings, if validated, could be far-reaching.

Hans-Gustaf Ljunggren, a researcher at Sweden's Karolinska Institute, and others have suggested that public immunity to the coronavirus could be significantly higher than what has been suggested by studies. In communities in Barcelona, Boston, Wuhan and other major cities, the proportion of people estimated to have antibodies and therefore presumably be immune has mostly been in the single digits. But if others had partial protection from T cells, that would raise a community's immunity level much higher.

This, Ljunggren said, would be "very good news from a public health perspective."

Some experts have gone so far as to speculate about whether some surprising recent trends in the epidemiology of the coronavirus - the drop in infection rates in Sweden where there have been no widespread lockdowns or mask requirements, or the high rates of infection in Mumbai's poor areas but little serious disease - might be due to preexisting immunity.

Others say it's far too early to draw such conclusions. Anthony Fauci, the United States' top infectious-disease expert, said in an interview that while these ideas are being intensely studied, such theories are premature. He said at least some partial preexisting immunity in some individuals seems a possibility.

And he said the amount of virus someone is exposed to - called the inoculum - "is almost certainly an important and likely factor" based on what we know about other viruses.

But Fauci cautioned that there are multiple likely reasons - including youth and general health - that determine whether a particular individual shrugs off the disease or dies of it. That reinforces the need, in his view, for continued vigilance in social distancing, masking and other precautions.

"There are so many other unknown factors that maybe determine why someone gets an asymptomatic infection," Fauci said. "It's a very difficult problem to pinpoint one thing."

- - -

News headlines have touted the idea based on blood tests that 20% of some New York communities might be immune, 7.3% in Stockholm, 7.1% in Barcelona. Those numbers come from looking at antibodies in people's blood that typically develop after they are exposed to a virus. But scientists believe another part of our immune system - T cells, a type of white blood cell that orchestrates the entire immune system - could be even more important in fighting against the coronavirus.

Recent studies have suggested that antibodies from the coronavirus seem to stick around for two to three months in some people. While work on T cells and the coronavirus is only getting started - testing T cells is much more laborious than antibody testing - previous research has shown that, in general, T cells tend to last years longer.

One of the first peer-reviewed studies on the coronavirus and T cells was published in mid-May in the journal Cell by Alessandro Sette, Shane Crotty and others at the La Jolla Institute for Immunology near San Diego.

The group was researching blood from people who were recovering from coronavirus infections and wanted to compare that to samples from uninfected controls who were donors to a blood bank from 2015 to 2018. The researchers were floored to find that in 40% to 60% of the old samples, the T cells seemed to recognize SARS-CoV-2.

"The virus didn't even exist back then, so to have this immune response was remarkable," Sette said.

Research teams from five other locations reported similar findings. In a study from the Netherlands, T cells reacted to the virus in 20% of the samples. In Germany, 34%. In Singapore, 50%.

The different teams hypothesized this could be due to previous exposure to similar pathogens. Perhaps fortuitously, SARS-CoV-2 is part of a large family of viruses. Two of them - SARS and MERS - are deadly and led to relatively brief and contained outbreaks. Four other coronavirus variants, which cause the common cold, circulate widely each year but typically result in only mild symptoms. Sette calls them the "less-evil cousins of SARS-CoV-2."

This week, Sette and others from the team reported new research in Science providing evidence the T cell responses may derive in part from memory of "common cold" coronaviruses.

"The immune system is basically a memory machine," he said. "It remembers and fights back stronger."

The researchers noted in their paper that the strongest reaction they saw was against the spike proteins that the virus uses to gain access to cells - suggesting that fewer viral copies get past these defenses.

"The current model assumes you are either protected or you are not - that it's a yes or no thing," Sette added. "But if some people have some level of preexisting immunity, that may suggest it's not a switch but more continuous."

- - -

More than 2,300 miles away, at the Mayo Clinic in Cleveland, Andrew Badley was zeroing in the possible protective effects of vaccines.

Teaming up with data experts from Nference, a company that manages their clinical data, he and other scientists looked at records from 137,037 patients treated at the health system to look for relationships between vaccinations and coronavirus infection.

They knew that the vaccine for smallpox, for example, had been shown to protect against measles and whooping cough. Today, a number of existing vaccines are being studied to see whether any might offer cross-protection against SARS-CoV-2.

When SARS-CoV-2, the technical name of the coronavirus that causes the disease covid-19, was first identified on Dec. 31, 2019

The results were intriguing: Seven types of vaccines given one, two or five years in the past were associated with having a lower rate of infection with the new coronavirus. Two vaccines in particular seemed to show stronger links: People who got a pneumonia vaccine in the recent past appeared to have a 28% reduction in coronavirus risk. Those who got polio vaccines had a 43% reduction in risk.

Venky Soundararajan, chief scientific officer of Nference, remembers when he first saw how large the reduction appeared to be, he immediately picked up his phone and called Badley: "I said, 'Is this even possible?'"

The team looked at dozens of other possible explanations for the difference. It adjusted for geographic incidence of the coronavirus, demographics, comorbidities, even whether people had had mammograms or colonoscopies, under the assumption that people who got preventive care might be more apt to social distance. But the risk reduction still remained large.

"This surprised us completely," Soundararajan recalled. "Going in we didn't expect anything or maybe one or two vaccines showing modest levels of protection."

The study is only observational and cannot show a causal link by design, but Mayo researchers are looking at a way to quantify the activity of these vaccines on the coronavirus to serve as a benchmark to the new vaccines being created by companies such as Moderna. If existing vaccines appear as protective as new ones under development, he said, they could change the world's whole vaccine strategy.

- - -

Meanwhile, at NIH headquarters in Bethesda, Md., Alkis Togias has been laser-focused on one group of the mildly affected: children. He wondered whether it might have something to do with the receptor known as ACE2, through which the virus hitchhikes into the body.

In healthy people, the ACE2 receptors perform the important function of keeping blood pressure stable. The novel coronavirus latches itself to ACE2, where it replicates. Pharmaceutical companies are trying to figure out how to minimize the receptors or to trick the virus into attaching itself to a drug so it does not replicate and travel throughout the body.

Was it possible, Togias asked, that children naturally expressed the receptor in a way that makes them less vulnerable to infection?

He said recent papers have produced counterintuitive findings about one subgroup of children - those with a lot of allergies and asthma. The ACE2 receptors in those children were diminished, and when they were exposed to an allergen such as cat hair, the receptors were further reduced. Those findings, combined with data from hospitals showing that asthma did not seem to be a risk factor for the respiratory virus, as expected, have intrigued researchers.

"We are thinking allergic reactions may protect you by down-regulating the receptor," he said. "It's only a theory of course."

Togias, who is in charge of airway biology for the National Institute of Allergy and Infectious Diseases, is looking at how those receptors seem to be expressed differently as people age, as part of a study of 2,000 U.S. families. By comparing those differences and immune responses within families, they hope to be able to better understand the receptors' role.

Separately, a number of genetic studies show variations in genes associated with ACE2 with people from certain geographic areas, such as Italy and parts of Asia, having distinct mutations. No one knows what significance, if any, these differences have on infection, but it's an active area of discussion in the scientific community.

- - -

Before the pandemic, Gandhi, the University of California researcher, specialized in HIV. But like other infectious-disease experts these days, she has spent many of her waking hours thinking about the coronavirus. And in scrutinizing the data on outbreaks one day, she noticed what might be a pattern: People were wearing masks in the settings with the highest percentage of asymptomatic cases.

The numbers on two cruise ships were especially striking. In the Diamond Princess, where masks weren't used and the virus was likely to have roamed free, 47% of those tested were asymptomatic. But in the Antarctic-bound Argentine cruise ship, where an outbreak hit in mid-March and surgical masks were given to all passengers and N95 masks to the crew, 81% were asymptomatic.

Similarly high rates of asymptomatic infection were documented at a pediatric dialysis unit in Indiana, a seafood plant in Oregon and a hair salon in Missouri, all of which used masks. Gandhi was also intrigued by countries such as Singapore, Vietnam and the Czech Republic that had population-level masking.

"They got cases," she noted, "but fewer deaths."

The scientific literature on viral dose goes back to around 1938 when scientists began to find evidence that being exposed to one copy of a virus is more easily overcome than being exposed to a billion copies. Researchers refer to the infectious dose as ID50 - or the dose at which 50% of the population would become infected.

While scientists do not know what that level might be for the coronavirus (it would be unethical to expose humans in this way), previous work on other nonlethal viruses showed that people tend to get less sick with lower doses and more sick with higher doses. A study published in late May involving hamsters, masks and SARS-CoV-2 found that those given coverings had milder cases than those who did not get them.

In an article published this month in the Journal of General Internal Medicine, Gandhi noted that in some outbreaks early in the pandemic in which most people did not wear masks, 15% of the infected were asymptomatic. But later on, when people began wearing masks, the rate of asymptomatic people was 40% to 45%.

She said the evidence points to masks not just protecting others - as U.S. health officials emphasize - but protecting the wearer as well. Gandhi makes the controversial argument that while people mostly have talked about asymptomatic infections as terrifying due to how people can spread the virus unwittingly, it could end up being a good thing.

"It is an intriguing hypothesis that asymptomatic infection triggering immunity may lead us to get more population-level immunity," Gandhi said. "That itself will limit spread."

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Agencies
August 4,2020

Washington, Aug 4: US President Donald Trump gave popular Chinese-owned video app TikTok six weeks to sell its US operations to an American company, saying Monday it would be "out of business" otherwise, and that the government wanted a financial benefit from the deal.

"It's got to be an American company... it's got to be owned here," Trump said. "We don't want to have any problem with security."

Trump said that Microsoft was in talks to buy TikTok, which has as many as one billion worldwide users who make quirky 60-second videos with its smartphone app.

But US officials say the app constitutes a national security risk because it could share millions of Americans' personal data with Chinese intelligence.

Trump gave the company's Chinese parent ByteDance until mid-September to strike a deal.

"I set a date of around September 15, at which point it's going to be out of business in the United States," he said.

Whatever the price is, he said, "the United States should get a very large percentage of that price because we're making it possible."

Trump compared the demand for a piece of the pie to a landlord demanding under-the-table "key money" from a new tenant, a practice widely illegal including in New York, where the billionaire president built his real estate empire.

"TikTok is a big success, but a big portion of it is in the country," he said. "I think it's very fair."

But Trump also threw a surprise new condition in any deal, saying the sale of TikTok's US business would have to result in a significant payout to the US Treasury for initiating it.

"A very substantial portion of that price is going to have to come into the Treasury of the United States, because we're making it possible for this deal to happen," Trump told reporters.

"They don't have any rights unless we give it to them," he said.

Sell or shut down

The pressure for a sale of TikTok's US and international business, based in Los Angeles, left the company and ByteDance facing tough decisions.

Trump has made TikTok the latest front in the ongoing political and trade battles between Washington and Beijing.

The app has been under formal investigation on US national security grounds because it collects large amounts of personal data on all its users and is legally bound to share that with authorities in Beijing if they demand it.

Both its huge user base and its algorithm for collecting data make it hugely valuable.

But being forced by the US government to sell at least its US business or be shut down -- and to then split the sale price with the US Treasury as Trump is demanding -- was an almost unheard-of tactic.

Shutting down could force users to switch to competitors, and many content creators are already encouraging followers to follow them on other social media platforms.

"The most obvious beneficiaries are Snapchat, Facebook and Twitter, with Snapchat likely being the biggest beneficiary," said investment analysts at Lightshed Partners.

Earlier Monday, ByteDance founder Zhang Yiming acknowledged the hefty pressure and said in a letter to staff, reported by Chinese media, that they were working around-the-clock "for the best outcome."

"We have always been committed to ensuring user data security, as well as the platform neutrality and transparency," Zhang said.

However, he said, the company faces "mounting complexities across the geopolitical landscape and significant external pressure."

He said the company must confront the challenge from the United States, though "without giving up exploring any possibilities."

According to Britain's The Sun newspaper Monday, as a possible consequence of the pressure, ByteDance is planning to relocate TikTok's global operations to Britain.

Pushing back

China's foreign ministry pushed back Monday, calling Washington hypocritical for demanding TikTok be sold.

"The US is using an abused concept of national security and, without providing any evidence, is making presumptions of guilt and issuing threats to relevant companies," said spokesman Wang Wenbin.

"This goes against the principle of market economy and exposes the hypocrisy and typical double standards of the US in upholding so-called fairness and freedom," he added.

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News Network
April 10,2020

Melbourne, Apr 10: Scientists have identified six drug candidates from more than 10,000 compounds that may help treat COVID-19.

The research, published in the journal Nature, tested the efficacy of approved drugs, drug candidates in clinical trials and other compounds.

"Currently there are no targeted therapeutics or effective treatment options for COVID-19," said Professor Luke Guddat from the University of Queensland in Australia.

"In order to rapidly discover lead compounds for clinical use, we initiated a programme of high-throughput drug screening, both in laboratories and also using the latest computer software to predict how different drugs bind to the virus," Guddat said.

The project targeted the main COVID-19 virus enzyme, known as the main protease or Mpro, which plays a pivotal role in mediating viral replication, the researchers said.

This makes it an attractive drug target for this virus, and as people don't naturally have this enzyme, compounds that target it are likely to have low toxicity, they said.

"We add the drugs directly to the enzyme or to cell cultures growing the virus and assess how much of each compound is required to stop the enzyme from working or to kill the virus. If the amount is small, then we have a promising compound for further studies," said Guddat.

After assaying thousands of drugs, researchers found of the six that appear to be effective in inhibiting the enzyme, one is of particular interest.

"We're particularly looking at several leads that have been subjected to clinical trials including for the prevention and treatment of various disorders such as cardiovascular diseases, arthritis, stroke, atherosclerosis and cancer," Guddat said.

Researchers said compounds that are already along the pipeline to drug discovery are preferred, as they can be further tested as antivirals at an accelerated rate compared to new drug leads that would have to go through this process from scratch.

"With continued and up-scaled efforts we are optimistic that new candidates can enter the COVID-19 drug discovery pipeline in the near future," Guddat said.

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