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A warning from the head of Moderna, a medical group, that the coronavirus vaccine may not be effective against the Omicron virus. anxiety on the world’s best anti-epidemic tool.
Although BioNTech vaccine makers have provided assurances that those who are fully deployed will have “greater protection against dangerous diseases” from new risks, there is no conclusive evidence of how the immune system works against radical changes.
Scientists who had not heard of Omicron last week are rushing to test the existing stress, as they prepare a new vaccine linked to an upcoming threat.
Why are scientists afraid that the vaccine will not work properly?
All available Covid-19 vaccines are designed to protect against Sars-Cov-2 virus, which was first discovered in Wuhan. Omicron writes as a slight change from his parents that scientists fear that the immune system produced by the original vaccine will no longer function properly.
The new species, first discovered in southern Africa, has 50 unprecedented mutations, more than half of which are in proteins that allow the virus to attach to human cells.
“There has been an arms race between the evolution of our antibodies when they are exposed to a vaccine and / or disease, and the virus as they try to escape the antibodies,” said Paul Bieniasz, a professor of retrovirology at Rockefeller University. “Omicron is the latest salvo of the virus in the genus.
The Bieniasz team this year developed a spike-shaped protein with 20 mutations, many of which were linked to the Omicron mutation, and found a genetic modification. “It was almost a complete denial” to antibodies that caused a previous infection or double shot of mRNA vaccine, he said.
“I am confident in my statement that it will be the most anti-antibody found. What the magnitude of this resistance will be, we do not know,” added Bieniasz.
However, Ugur Sahin, chief executive of BioNTech, the developer of the vaccine now developed by Pfizer, was impressed. “We hope that people who are fully vaccinated will still have adequate protection against the deadly diseases caused by Omicron,” he said.
What are the chances of a vaccine being developed again?
After Stéphane Bancel, Moderna’s chief, predicted that there would be a “material drop” in terms of the effectiveness of existing vaccines, he said his company is making progress with new drugs against the Omicron brand.
Eleanor Riley, professor of immunology and infectious diseases at the University of Edinburgh, said the mayor of Moderna “could be as accurate as the current vaccine is sufficient to prevent the disease”.
But the consequences of hospitalization and death should be minimal, he said, since “immune deficiency is linked to T-cells” which are “less susceptible” to mutations. T-cells form part of the body’s immune system, which provides a stable immune system.
Roberto Burioni, a professor of Microbiology and Virology at Vita-Salute San Raffaele University, stressed that it is “impossible to judge” the type of virus based on the number of mutations.
“With the changes, it’s not a game at all,” he said, adding that testing for the new vaccine could take a week.
Penny Heaton, J&J’s global vaccine chief, said his team began preparing for the changes as soon as they received more information, adding that they wanted to know if the same shooting was still going on and start making changes. The Bible.
“My team. . . “He has been studying all the genetic material that has been developed and is looking at how to make it better and planning everything to make and develop the vaccine,” he said.
How long will it take and what are the barriers?
BioNTech, along with Pfizer, said last weekend that it had moved “months ago” to change the existing vaccine if it could “run away”, and that it could deliver the first batches within 100 days.
Oksana Pyzik, a fellow lecturer at University College London’s School of Pharmacy, said vaccinators have been “at war” against any new species for some time.
“The longest phase of all these cases is not just changing vaccines, testing protections, interpreting data and increasing availability,” Pyzik said.
An example of a coronavirus vaccine modification is similar to that of the flu vaccine, which is changed every year without the need for human clinical trials.
Jacob Glanville, a physiotherapist and founder of the US company Centivax, also stated that the 100-day period was “extremely fast” and could not be shortened.
It also affected the process of administering the new vaccine carefully, followed by multiplication and immunization tests. “There are steps in biology that you can’t speed up,” he said.
All the leading manufacturers “can quickly convert the new Omicron vaccine and make immunogenicity reagents in a matter of months”, stressed John Bell, a professor of medical regius at Oxford University, who co-engineered the initiative that launched the Oxford / AstraZeneca vaccine.
“Much will depend on the skills of the directors,” he added.
But a new vaccine must be very important. Airfinity, a life science research company, said in the best case scenario 6bn levels could be made by October next year.
Where does this leave the incentive program?
The threat from this new breed has increased the popularity of Western booster jab programs, as countries including UK increased efforts to increase adequate protection before winter.
Scientists confirmed that third-party booster jabs were less important now that Omicron differences were emerging.
“Nothing to lose with motivation,” Burion told Vita-Salute San Raffaele University. “If Omicron reduces the effectiveness of the vaccine, you would prefer not to have a three-dose immunization and not just two.”
One alarming global evidence emerged Tuesday, with reports that two Israeli doctors had contracted the Omicron virus despite receiving a three-dose BioNTech / Pfizer vaccine. So far they have shown some signs.
“Why [Omicron] it can counteract the high levels of antibodies in people with exercise, we do not know, “says Bieniasz of Rockefeller University.
He also said that both those who received the vaccine and those who were infected with the virus had “gold” to protect the immune system, adding that his research had shown “it has many antibodies that can disrupt even our genetic mutations.”
This gave hope that those who received a stimulant shot or vaccine that was previously ill could have “adequate protection”, he added.
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