Health experts around the world are sounding the alarm as they begin to report that Omicron BA.5, a coronavirus strain that is currently surpassing other forms of infection and has become an influential strain in the United States and abroad, has the potential to re-infect humans within weeks. Shrink the virus.
Andrew Robertson, chief health officer for Western Australia, told News.com.uk that although previously it was known that most people would maintain a certain level of protection against re-infection if they were vaccinated or maintained some level of natural immunity. This did not happen in the case of the recent contraction of the virus, the most recent strain.
“What we’re seeing is an increase in the number of people infected with BA.2 and then four weeks later,” the doctor explained in an interview with an Australian news outlet. “So probably in six to eight weeks they’re developing a second infection, and it’s almost certainly BA.4 or BA.5.”
The ability of the BA.4 and BA.5 strains to re-infect people who will have strong immunity to the previous wave of Covid-19 Some experts have begun to call this latest strain the most contagious so far.
“They’re taking it, so obviously they’re more contagious than the previous form of Omicron,” said David Montefiori, a professor at the Human Vaccine Institute at Duke University Medical Center, in an interview with NBC News.
Federal estimates released by the Center for Disease Control and Prevention on Tuesday show that BA.5 has now surpassed the dominant strain in the United States, accounting for about 54 percent of cases for the week ending July 2, 2022.
And although the average number of new cases recorded daily in the United States has steadily risen from about 95,000 to 115,00, according to data from there New York Times, Experts fear that a combination of home testers not reporting positive cases, closing government-funded testing centers and shutting down their daily data updates in the states has led to a less accurate picture of how much this new strain is actually entering the nation.
A study has been published Science The disturbing reality of the past week has confirmed that many have already figuratively faced multiple recurrent relapses: these two new variants avoid protection from previous infections and vaccines.
Professor of Immunology Danny Altman, a co-author who wrote Science Rosemary Byton, a professor of immunology and respiratory medicine, as well as a paper discusses the results of their research in a recent op-ed. They noted that, contrary to a popular belief that vaccines and previous infections would provide a “wall of immunity,” countries are experiencing a “wave of new cases” instead.
In the study, Professor Altman explained how they followed people infected with triple wax and who suffered groundbreaking infections during previous omicon waves.
“This allows us to test whether Omicron, as some had hoped, was a benign natural booster of our covid immunity,” he wrote. Guardian. “It turns out that’s not the case.”
“Most people – even when triple-vaccinated – had 20 times less neutral antibody response against omikron than the initial ‘Uhan’ strain,” Mr Altman said.
“It’s a kind of stealth virus that goes under the radar,” he insisted.
Mr. Altman’s research seems to confirm other recent studies published in recent weeks that warn of the potential of new subverts to avoid protection from the build-up of previous resistance; Namely vaccination and natural immunity.
Research has been published Nature Outside of Columbia University, a study that has not yet been reviewed peer-to-peer suggests that BA.4 and BA.5 are four times more resistant to vaccine antibodies than BA.2, a subwoofer that became the dominant strain in the United States in April. Powered core strain replacement.
Although experts believe that these current strains will probably fuel the new wave, they have noticed that vaccines will provide partial immunity and may still protect against potentially more serious infections.
“Our data suggest that these new Omicron submarines will likely be able to increase the risk of infection in populations with high levels of vaccine resistance as well as natural BA1 and BA2 immunity,” Dr. Dan Baruch told CNN. “It is likely that vaccine immunity will still provide adequate protection against serious diseases with BA4 and BA5.”
Dr. Baruch was one of the co-authors of a separate paper, with which he published New England Journal of MedicineWhich showed that vaccines against BA.4 and BA.5 and antibodies neutral to infection decreased threefold, significantly lower than those of BA.1 and BA2.
Because of this, the vaccines that many have received in the last 18 months will probably require an update, not just a boost.
The Federal Drug Administration last week recommended that Covid-19 vaccine manufacturers, such as Pfizer and Moderna, begin changing what they currently have on offer so that their booster shots can more accurately target and estimate BA.4 and BA.5 variants. That these shots may be available in the middle of the fall.