•   
  •   
  •   

Health Chinese scientists say there may be second, more dangerous coronavirus strain

21:45  06 march  2020
21:45  06 march  2020 Source:   latimes.com

All the ways you can—and can’t—catch the coronavirus

  All the ways you can—and can’t—catch the coronavirus You’re most likely to catch the virus from droplets of mucus or saliva. The primary way that the new coronavirus spreads is when someone coughs or sneezes and sprays germ-filled droplets of mucus or saliva into the air. If you’re nearby, the secretions can land on your face or body, or you can breathe them in.Generally these moist, infectious projectiles can travel up to 6 feet from the infected person, says Charles Chiu, associate director of the UCSF Clinical Microbiology Laboratory. This means you must be in fairly close proximity to a sick person to catch the virus.

If the second variant develops, it has to be more strong as a result of mutation. Could this be more transmissible and aggressive than the first one? Stay informed about coronavirus .

Chinese scientists who compared the genetic […] Chinese scientists who compared the genetic sequences of 103 viral samples from patients infected with COVID-19 said their evidence suggests that the virulent version of the coronavirus — which they tagged the “L-type” version — was the dominant

Slideshow by photo services

The global outbreak that has sickened nearly 100,000 people across six continents may actually be fueled by two variants of the same coronavirus: one older and less aggressive and a newer version whose mutations may have made it more contagious and more deadly, according to a controversial new study.

Chinese scientists who compared the genetic sequences of 103 viral samples from patients infected with COVID-19 said their evidence suggests that the virulent version of the coronavirus — which they tagged the “L-type” version — was the dominant strain in the earliest phase of the outbreak that began in Wuhan, China, late last year. That strain, they said, appeared to recede as the epidemic progressed.

First person to receive experimental coronavirus vaccine says she learned about the trial on Facebook and had to sign a 45-page waiver before she could receive the shot - as it's revealed participants will be paid just over $1000

  First person to receive experimental coronavirus vaccine says she learned about the trial on Facebook and had to sign a 45-page waiver before she could receive the shot - as it's revealed participants will be paid just over $1000 Jennifer Haller, 43, of Seattle, Washington said she heard about the trial about two weeks ago, when Kaiser Permanente Washington Health Research Institute 'put out a call for volunteers.'Mom-of-two, Jennifer Haller, 43, of Seattle, Washington, told Refinery 29 that she heard about the vaccine trial about two weeks ago, when Kaiser Permanente Washington Health Research Institute 'put out a call for volunteers.

Scientists say this coronavirus has mutated and become more contagious. Scientists have identified a new strain of the coronavirus that has become dominant worldwide and appears to be In addition to spreading faster, it may make people vulnerable to a second infection after a first bout

Here at Live Science , we've compiled a list of the most pervasive myths about the novel coronavirus SARS-CoV- 2 What's more , if scientists were trying to use computer models to engineer a deadly virus based on the Wearing medical masks for long periods may be uncomfortable for some, but it

But among samples collected later, as COVID-19 spread across China and into other countries, a variant of the virus they dubbed the “S-type” was more common, the scientists reported. They suggested that the genetic makeup of the S version more closely resembles coronaviruses circulating in bats and pangolins, the animals that are thought to have incubated the virus before it jumped to humans. And they surmised that it is a less virulent version.

The findings suggest the S-type version of the coronavirus may have escaped its animal hosts earlier than previously believed — and that it may have been circulating longer without causing enough illness to set off alarm bells.

The Chinese scientists reported their analysis Thursday in the journal National Science Review. The team was led by Peking University’s bioinformatics researcher Jian Lu in Beijing.

The study authors acknowledged that their conclusions are very preliminary and are based on a very small sample of viruses. The variations they found will need to be observed in many more specimens taken from other patients, and their genetic differences will need to be compared with physicians’ reports and epidemiological notes. Only then can their suspicions can be confirmed, they wrote.

'I Wasn't Scared': The First Person To Test The Coronavirus Vaccine

  'I Wasn't Scared': The First Person To Test The Coronavirus Vaccine Jennifer Haller, 43, from Seattle doesn’t have the virus, but she volunteered to take part in the trial in order to help fight the disease. Pictures: Coronavirus (COVID-19) outbreak around the world 1/131 SLIDES © Ciro De Luca/Reuters A soldier guides passengers arriving from Turin and Milan by train at the Naples Central station as they wait to get their self-certification documents checked, in Italy on March 22. 2/131 SLIDES © Eduardo Munoz/Reuters A man walks around a local park in Weehawken, New Jersey, U.S., on March 22.

Coronavirus has mutated into two strains , one which appears to be far more aggressive, scientists have said , in a discovery which could hinder The Chinese scientists , who analysed the viral DNA from 103 infected people, said it appeared the less dangerous ‘S-type’ was now taking over, possibly

The coronavirus still has a long way to go. That’s the message from a crop of new studies across the world that are trying to quantify how many Official case counts often substantially underestimate the number of coronavirus infections. But in new studies that test the population more broadly, the

Officials at the World Health Organization warned that “it’s important we don’t overinterpret” the scientists’ findings.

“It’s got a slightly different signature, but it’s not a fundamentally different virus,” said Mike Ryan, the WHO official coordinating the agency’s response to the COVID-19 epidemic.

Some scientists were far more critical, with some calling for the paper to be retracted.

The new analysis comes from scientists in a relatively new and fast-moving field that’s devoted to the genetic investigation of disease-causing germs.

Using a technique called phylodynamic analysis, researchers collect and sequence the genomes of many samples of a given microbe and scour them for tiny substitutions in their DNA or RNA. By tracking those genetic shifts, they can reconstruct a rough picture of a germ’s passage through a population, and detect turning points along the way.

The authors of the new study compared genetic sequences of viral samples taken from 27 patients in Wuhan, 33 patients from elsewhere in mainland China, three from Taiwan and 40 from patients outside China.

Can you become immune to the coronavirus?

  Can you become immune to the coronavirus? Can you become immune to the coronavirus?The answer is a qualified yes, with some significant unknowns. That’s important for several reasons.

Second Coronavirus Strain . What to Expect. How Many Coronaviruses Are There ? Coronaviruses didn’t just pop up recently. They’re a large family of viruses that have been around But the scientists say the L type was more common early in the outbreak. One may cause more disease than the other.

Not Likely, Scientists Say . A preliminary report posted online claimed that a mutation had made the virus more transmissible. The mutation, they wrote, “ is of urgent concern,” because it made the coronavirus more transmissible. Following media coverage, the prospect of a turbocharged strain

Comparing all those samples to those taken from bats, they found relatively little evidence of variability. That suggests the novel coronavirus has circulated in humans for only a few months, changing little as it jumped from person to person and replicated itself, they wrote.

But when the scientists compared the 30,000 nucleotides of each sample to one another and focused on finding differences among them, they found a much greater degree of variability. That’s a sign that the changes in the virus since it began to infect humans were “much larger than previously estimated,” they wrote.

Of the 103 viral genomes they scoured, 70% were of the L-type variant. But by early January, the scientists wrote, it appears that “human intervention” — possibly the “rapid and comprehensive prevention and control measures” adopted by China — had begun to limit the spread of this strain.

By late January, doctors and health authorities were on high alert and testing widely for COVID-19 infection. But at that point, the Chinese scientists speculated, they were collecting samples from patients who were sickened by the older, less dangerous S-type version of the virus.

Some geneticists who weren’t involved in the study argued that the data could support an alternative interpretation: that the virus has simply spread more widely than they had realized, picking up random mutations along the way. Those mutations may or may not make the virus behave differently.

Foods That Weaken Your Immune System

  Foods That Weaken Your Immune System Want to feel better faster? The first step you need to take is avoiding these foods.

If the S-type of the virus is the older version that was circulating first, a final mystery remains: Why would the majority of samples taken from the initial patients in Wuhan have fallen into the L-type category? Shouldn’t there be more S-types in the mix?

a close up of a flower: This illustration provided by the Centers for Disease Control and Prevention in January 2020 shows the 2019 Novel Coronavirus. This virus was identified as the cause of an outbreak of respiratory illness first detected in Wuhan, China. © CDC/CDC/TNS This illustration provided by the Centers for Disease Control and Prevention in January 2020 shows the 2019 Novel Coronavirus. This virus was identified as the cause of an outbreak of respiratory illness first detected in Wuhan, China. This is where the Chinese scientists make a hotly debated leap: They surmise that the newer L-type version probably picked up more mutations, and evolved further from the bat coronavirus from which it originated, because it either infects people more readily or it replicates more vigorously once it infects.

In other words, it’s more transmissible or more aggressive — or both.

University of Edinburgh geneticist Andrew Rambaut urged caution about that conclusion. When genetically sequenced samples represent a small and haphazardly collected subset of all infections, the kinds of genetic variations noted by the scientists are “entirely expected,” he wrote on Twitter.

To claim that such mutations necessarily make a virus behave differently, he added, “is a flawed inference.”

A group of researchers from the MRC-University of Glasgow Center for Virus Research in Scotland offered a more detailed rebuttal of the new paper. Among other things, they said the study authors misinterpreted their data and failed to account for limitations in their statistical methods.

“Given these flaws, we believe that Tang et al. should retract their paper, as the claims made in it are clearly unfounded and risk spreading dangerous misinformation at a crucial time in the outbreak,” the Glasgow team wrote.

———

©2020 Los Angeles Times

Visit the Los Angeles Times at www.latimes.com

Distributed by Tribune Content Agency, LLC.

Lack of immunity means China is vulnerable to another wave of coronavirus, top adviser warns .
Lack of immunity means China is vulnerable to another wave of coronavirus, top adviser warnsIndat Ange Desire, 30, and Marie Andrea Offoumou, 28, pose on the stairs at their wedding ceremony, following the easing of restrictive measures against the spread of the coronavirus, in Abidjan, Ivory Coast, on May 15.

usr: 3
This is interesting!