If you want to get a good sense of how the omicron variant of COVID-19 is going to spread in the United States, just look across the ocean.Inthe United Kingdom and South Africatwo nations in which the omicron variant is quickly becoming more dominant than delta, or has already infection rates are surging, largely becausethe variant is so much more transmissible. While current evidence suggests patients stricken with omicronare less likely to require hospitalization or die, huge infection rates have put massive pressure on both nations' infrastructure.
Now that omicron has graced the shores of the United States, we appear to be in the early phases of what the aforementioned countries are experiencing.In New York City, the percentage of people testing positive for COVID-19 doubled in three days this week, with a Mayor Bill de Blasio advisor attributing the spike to the omicron variant.During a Tuesday briefing for the Centers for Disease Control and Prevention (CDC), top federal health officials told reporters that there had been a sevenfold jump in the prevalence of theomicron variant over the course of a single week.
Although the surgecould subside after the spring, they added thatif current trends persistthere may be a public health crisis. This would beespecially so if the delta variant continues to wreak havoc, and aninfluenza epidemic exacerbates the problemcaused by the pair of COVID-19 strains. The former scenario is already occurring and the latter is increasingly plausible, at least based on the timetable that scientists have established for when the omicron variant is likely to surge in the United States.
"Based on data from South Africa and Europe we can expect a significant increase in case numbers here in the US in the next several weeks,"Dr. Stephen Goldstein, professor at the Eccles Institute of Human Genetics at the University of Utah, told Salon by email."It is possibletolikely that peak cases numbers will exceed last winter's peak."
Dr. Georges Benjamin, executive director of the American Public Health Association, predicted that omicron will become the dominant variant in the United States within three to six months.
"This is based on its high degree of infectiousness, the significant number of people unvaccinated and the degree of breakthrough infections for people that are fully vaccinated but un-boosted," Benjamin explained in writing."Breakthrough infections in people that are fully vaccinated and boosteddo occur, but are at a lower rate."
The underlying problem is that the omicron variant is more transmissible than previous variants. When it comes to stopping a pandemic, there are few things that epidemiologistsdread more than a hyper-transmissible bug.
IndeedDr. Russell Medford, chairman of the Center for Global Health Innovation and Global Health Crisis Coordination Center, told Salon by email that he expects the omicron variant to dominate in the United Statesjust as it currently does in the United Kingdombecause "the omicron variant is significantly more transmissible than delta."
Dr. Monica Gandhi, infectious disease doctor and professor of medicine at the University of CaliforniaSan Francisco, also said that the omicron variant is "more transmissibleand will cause a wave of new infections," but added that"there is now evidence that Omicron is less severe than previous strains." What scientists do not yet know, she added, is "if this is because of increasing cellular immunity in the population in December 2021 versus an inherent property of the strain that makes it less virulent."
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Beyond transmissibility, the next-biggest concern with omicron is the question of vaccine resistance. In the past six months, the delta variant's spread was blunted by the number of vaccinated Americans and while delta was faintly vaccine-resistant, the majority of COVID-19 hospitalizations and deaths in the United States were among theunvaccinated, prompting the head of the CDCto dub the situation a "pandemic of the unvaccinated."
Yet omicron may be more vaccine-resistant than delta, primarily for reasons relating to mutations onthe spike protein.B.1.1.529 (the omicron variant's official name) has30 mutations located near the spike protein which is worryingmainly because the mRNAvaccines produced for COVID-19 specifically target it. The spike protein comprises thespikes that jut out from around the SARS-CoV-2 virus'central sphere like spines on a sea urchin. The virus uses those spikes to enter a body's cells, like a pick being used to open a lock, while existingvaccines help one's cells produce proteins like those on the spikes that the immune system produces antibodies against. If the mutations sufficiently alter the spike protein, the body's immune system may be less adept at recognizing the virus, having been prepared to fight a different version of the spike.
"The two vaccinations, typically of any of the vaccines, offervirtually no protection against infection and transmission,"Dr. William Haseltine,founder and former CEO of Human Genome Sciencesandcurrently the chair and president of the global health think tank Access Health International, told Salon."Three vaccinations offeronly very temporaryprotection after three months."
Haseltine also noted that the vaccines were adept at reducing hospitalization and death, perhaps even by as much as tenfold, but"will not eliminate it." And, he added, the vaccines "will notspare those who are infected from you who are not similar protected from the consequences ofthe disease, which can be quite serious." That's because the vaccine is defensive, Haseltine said: it does not stop the virus from entering the body, only fights it once it is inside.
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Goldstein drew attention to a different caveat to the undeniable advantages of pre-existing immunity (whether through vaccination or infection).
"While encouraging on an individual basis, this coming surge will almost certainly produce enough severe infections to overwhelm already stretched healthcare resources," Goldstein pointed out."Double vaccination orprior infection, though they likely blunt severity, will not provide substantial protection from infection and onward transmission of omicron. It is imperative that people get vaccinated and/or boosted as soon as possible to protect themselves from the imminent omicron surge."
Medford seemed more cautiously optimistic in his assessment. He told Salon that the omicron variant was "considerabl[y]more resistant than delta to the neutralizing antibodies generated by our first line mRNA vaccines, and even more so with other vaccine types" andadded that "fortunately, a third dose of the mRNA vaccine, or booster, appears to largely correctthis vaccine resistance." He said he thinks it is likely that the mRNA vaccines remain effective, "especially with a third dose booster," when it comes to preventing hospitalizations and deaths from serious omicron variant infections although he added this has not been formally documented.
When it comes to the long-term consequences of the omicron variant in terms of the COVID-19 pandemic, two of the experts who spoke with Salon used the same word "endemic."
"The pandemic is transiting into aphase where it is endemic," Benjamin told Salon. "This means there will episodic outbreaks that will be managed by contact racing, individual quarantines, targeted closures of activities or events and vaccinations /revaccinations for people that need it. Eventually as the disease becomes less severe/lethal some of these pubic health measures may be relaxed."
Medford had a similar observation.
"COVID-19 variants such as omicron and others in the future will become an endemic feature of this disease akin to seasonal influenza," Medford explained. "The data today with current vaccines are promising in that full vaccination (3 doses) are remain effective even in the face of new and structurally different viral variants."
If COVID-19 truly is going to be endemic, then perhaps policymakers will need to take that into account.Looking forward, Gandhi (who did not use the word "endemic" in her email) suggested that it might be wise for public health officials to base their policies off of hospitalizations rather than infections, given that the omicron variant could lead to a surge of mild cases.
"We are likely to get many cases with omicron worldwide but since the severity of disease is reduced the impact of this variant (and restrictions such as mask mandates and capacity limits) should be based on hospitalization metrics for COVID-19," Gandhi pointed out. "If the omicron variant is that transmissible but causes less severe disease, it is likely to find unvaccinated individuals, leading to more immunity in those populations, and infect even vaccinated individuals, boosting their immunity even further which will hasten more immunity and hopefully make the pandemic calm own worldwide."
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We asked scientists what the omicron variant is going to do to the United States - Salon
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