Assume the more infectious coronavirus variant is in your community图片展示
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Assume the more infectious coronavirus variant is in your community详情
UPDATE: Jan. 19, 2021 at 10:10 a.m. EST: On Jan. 15, the CDC reported the more transmissible coronavirus variant from the UK (known as B.1.1.7) is spreading rapidly and is expected to become the dominant U.S. strain by March.
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The same day a mob of weapon-bearing Trump-zealots hijacked the Capitol Building, fatally injured a police officer, carved "Murder the media" on a door, and marched freely through the halls with a Confederate flag, the coronavirus killed nearly 4,000 Americans. It was the deadliest COVID-19 day in the U.S., but only for a short time. Regrettably, the following day COVID-19 deaths eclipsed 4,000. That equals almost 24 Oklahoma City bombings.
Yet the latest coronavirus outbreaks in the U.S. come with another unsettling reality. A new, more contagious variant — some 40 to 70 percent more infectiousthan previous strains and responsible for skyrocketing cases in the UK — is spreading in the U.S., though the CDC estimates its prevalence in reported cases is still low. The variant has been confirmed in Texas, New York, Florida, California, Colorado, and beyond. The impacts could grow serious, as previous coronavirus strains were already excellent at spreading. Infectious disease experts emphasize it's wise to assume the new strain (dubbed the B.1.1.7 lineage) has been spreading for at least weeks in the U.S., and will continue spreading.
"It's a safe assumption that this virus can be found in communities all around the country," said Brian Labus, a public health expert at the University of Nevada, Las Vegas.
The true extent of spread in the U.S. is uncertain because the nation currently lacks the resources to undertake rigorous genomic sequencing of the coronavirus. This means regularly analyzing the virus in infected patients to identify both common and newly mutated strains. (In contrast, the UK, where researchers first discovered this more infectious variant, has an advanced coronavirus surveillance system.)
The more transmissible variant is becoming dominant in parts of the UK, and will likely grow dominant in regions around the U.S., too. It has an edge over less infectious strains.
"That's how virus dynamics work," said Mark Cameron, an immunologist at Case Western Reserve University who previously helped contain the outbreak of another deadly coronavirus, SARS, in 2003. "The variant has a competitive advantage. The virus will dominate. The virus will spread faster."
"That's a bitter pill to swallow," he added.
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There is "good news," however. The coronavirus vaccines, which proved safe and effective through a meticulous vetting process in the U.S., are expected to work on the mutated strain, Labus said. (Viruses naturally and often mutate, so virologists and drugmakers plan for some degree of change when creating vaccines.) What's more, the new variant hasn't shown to be more virulent, meaning more harmful to the body, emphasized Labus. There's no evidence it will increase the rate of hospitalizationand deathin those infected. "It's the same disease," he said.
"The virus will dominate. The virus will spread faster."
But, if the more infectious variant tends to infect more people than previous strains, this means more hospitalized individuals overall than otherwise would have occurred. Grimly, more sick inevitably means more deaths, said Cameron. The mounting sick will continue to strain already-overburdened hospitals, some of which are already in crisis.
What can we do?
Fortunately, we aren't powerless. The arrival of the new variant means fighting pandemic fatigue and boosting vigilance about what you likely already know:
Avoid all gatherings and crowds.
Wear masks in public (to both avoid unwittingly exhaling and inhalingthe virus).
Wash your hands, often, with soap and water.
Stay at least six feet away from people you don't live with.
"There's even more reason to follow common-sense precautions," said Dr. Amesh Adalja, an M.D. and senior scholar at the Johns Hopkins University Center for Health Security.
"Now it's even more critical that you practice the good old things that Fauci has been talking about for the last year," agreed Dr. Peter Gulick, a D.O. and professor of medicine at Michigan State University.
Yet as the new variant spreads and vaccinations lag, some of our public behaviors may need to change, emphasized Cameron. For example, we've learned how to reduce (but not nearly eliminate) the risk of spreading COVID-19 in many workplaces, at doctors' offices, and during outdoor dining. But those measures might not cut it anymore. "All of a sudden risk increases," said Cameron. Perhaps we'll need to start enhancing our masks (double-masking), or reduce the number of people allowed in certain workplaces.
This new, mutated strain is more infectious because it has changed the notorious spikes that protrude from the coronavirus. It makes the spike significantly better at binding to human cells and, like a key, entering. "It attaches quicker, and gets into cells quicker, and infects quicker," said Gulick.
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What's more, disease experts emphasized getting vaccinated with the deeply vetted, FDA-approved vaccines when your state allocates them to you. Vaccines are an extraordinary public health achievement: They're the reason you don't know anyone in the U.S. suffering the terrible ills of smallpox or polio. For this latest pandemic, we must vaccinate around 80 percent of the populace to achieve widespread herd immunity. This makes it difficult for the virus to move through the population.
We can't, however, contend with this new variant alone. We'll need the help of the incoming Biden administration if we want to track the spread of this variant (along with inevitable, forthcoming mutations).
"We need to restore our connection to global efforts to sequence and track this virus as it circulates as well as invest highly in tracking the evolution of this virus within our own borders," said Cameron.
Don't become a host
Avoiding infections will give the virus fewer opportunities to mutate and possibly grow into more infectious or drug-resistant strains. Remember, viruses are excellent parasites. They rely on hosts to multiply, spread, and change.
"We are as a global community, but especially in the U.S., giving this virus free rein to infect lots of people, and free rein to evolve to higher pathogenicity," said the immunologist Cameron. "We know this virus is capable of evolving to be more dangerous."
The virus can particularly succeed while it's replicating inside the bodies of people with weakened immune systems (such as those with chronic illnesses, smokers, and older people). "Immunodeficent patients hold onto the virus more," Dr. Gulick said. "It lingers longer."
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The virus wants to exploit your body so it can reproduce. Indeed, the coronavirus is "possibly 10 times or more"deadlier than most flu strains, but it often doesn't kill too quickly. "The main purpose of that virus is to keep you alive," stressed Dr. Gulick. "If it kills you quickly, it loses its hosts."
As of Jan. 11, 2021, Johns Hopkins University School of Medicine has compiled over 90 million reportedinfections worldwide, nearly a quarter of which have occurred in the U.S. Put another way, we're giving this virus everything it needs to flourish.
Be hyperaware, say those who know viruses best. "You really don’t want to play games with this," said Dr. Gulick.