The new COVID-19 strain has been confirmed in multiple states in the U.S., as well as dozens of countries across the globe.

By Faith Brar
Updated January 15, 2021
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In December, a new and seemingly more contagious strain of SARS-CoV-2, the virus that causes COVID-19, began spreading in the UK. Now, health officials are confirming cases of the new COVID-19 variant in several countries across the globe — including the U.S.

On December 29, Colorado Governor Jared Polis said in a statement that the first U.S. case of the new COVID strain was found in his state. "The individual is a male in his 20s who is currently in isolation in Elbert County and has no travel history," reads the statement. The unidentified man will remain in isolation "until cleared by public health officials," according to the statement.

The same week, California confirmed its first known case of the new strain. Since then, health officials in the state have discovered a total of at least six cases of the new COVID-19 variant, according to The Mercury News. The new strain has also been confirmed in New York and Florida, exclusively among people with no reported travel history, leading experts to anticipate more community spread of the new strain throughout the U.S. "You're going to find over the days ahead, it's in many locations in the United States," Michael Osterholm, an epidemiologist and member of President-elect Joe Biden's COVID-19 advisory board, said on CNBC's "Squawk Box."

UK researchers first discovered the new COVID-19 strain — known in technical terms as SARS-CoV-2 VUI 202012/01 (Variant Under Investigation, year 2020, month 12, variant 01, in case you're interested) — in September, reports BBC News. By mid-December, the mutation appeared to be responsible for about two-thirds of all COVID-19 cases in London at that time, according to the news outlet.

What's worse, the World Health Organization (WHO) said the new COVID-19 strain has already been found in Denmark, Australia, Italy, and the Netherlands. Cases of the new strain are continuing to pop in several other countries as well, including South Korea, Spain, Sweden, Canada, Switzerland, and India, just to name a handful.

As of now, more than 40 countries have banned UK arrivals due to concerns about the new COVID-19 variant, according to BBC News. This currently doesn't include the U.S. However, as of December 28, the Centers for Disease Control and Prevention (CDC) is requiring that all travelers from the UK test negative for COVID-19 within 72 hours of their flight to the U.S.; negative COVID-19 test results will need to be presented to the airline before boarding. (Related: What to Know About Air Travel During the Coronavirus Pandemic)

To make matters even more complicated, new COVID-19 variants have also been discovered in South Africa and Brazil. Yes, they're separate from both one another and independent from the UK strain, although all three strains appear to have mutations in the virus's spike protein (the part of the virus that binds to receptors in your cells and infects you with COVID-19), according to the CDC. While researchers are still working to understand what's making these COVID variants spread so quickly, experts say these spike protein mutations may have something to do with it. (See: Why Are the New COVID-19 Strains Spreading More Quickly?)

As scary as that all sounds, Brett Giroir, M.D., the U.S. assistant secretary of health at the Department of Health and Human Services, told ABC News there's no need to panic just yet. Here's what you need to know about the new COVID strain. (FTR: For the purposes of this story, we'll be discussing the strain discovered in the UK when referencing "the new COVID strain.")

Credit: d3sign/AlonzoDesign/Getty

First, know that this isn't the first time we've seen COVID-19 mutations.

In his interview with ABC News, Dr. Giroir noted that there have already been nearly 4,000 different mutations among the virus that causes COVID-19 and that researchers have been studying these changes since the beginning of the pandemic.

The most worrying mutations are those that can help the virus evade your immune system or the effects of vaccines and antibody therapies, according to a recent feature published in the scientific journal Nature. (The same holds true for any virus.) So far, researchers haven't identified any of these types of particularly concerning mutations.

A key factor with SARS-CoV-2 VUI 202012/01, however, is that it seems to spread more efficiently compared to other known COVID-19 strains, says Robert Amler, M.D., dean of New York Medical College's School of Health Sciences and Practice and former chief medical officer at the CDC.

More specifically, a person infected with this new so-called "UK COVID-19 strain" may spread the virus to, on average, 1.5 people, while someone with a "standard" strain of COVID-19 is expected to infect about 1.1 people, said Maria Van Kerkhove, a technical lead at the WHO, according to U.S. News & World Report. (Related: Everything You Need to Know About Coronavirus Transmission)

Researchers are still trying to understand what, exactly, makes this new COVID-19 variant more transmissible than others. One theory is that this particular strain has become more sustainable in the air, making it easier for the virus to travel from person to person, says Dr. Amler. But, as with so much about this virus, we just don't know enough yet.

On the bright side, there's currently no evidence that this variant causes more severe COVID-19 illness or increased risk of death from the virus, according to the CDC.

Is the new COVID-19 strain covered by the vaccine?

As of now, experts seem optimistic about the effectiveness of COVID-19 vaccines against all strains of COVID-19, including the SARS-CoV-2 VUI 202012/01 variant. "So far, even though we've seen a number of changes and a number of mutations, none has made a significant impact on either the susceptibility of the virus to any of the currently used therapeutics, drugs, or the vaccines under development and one hopes that that will continue to be the case," said Soumya Swaminathan, M.D., chief scientist at the WHO, according to NBC4 Washington. (More here: How Effective Is the COVID-19 Vaccine?)

For context, officials from the WHO also said in a press briefing that, overall, COVID-19 seems to be mutating "at a much slower rate" than the seasonal flu, which is reassuring in terms of the public health response.

"Influenza is notorious for mutating quickly," explains Dr. Amler. "It makes it difficult to immunize against, which is why last year's flu vaccine doesn't work very well against this year's newly mutated flu virus."

But since the SARS-CoV-2 virus doesn't appear to be changing as drastically, there's no reason why it should be resistant to COVID-19 vaccines, including those from Pfizer and Moderna, which have already been authorized for emergency use by the FDA, says Dr. Amler. (Related: Everything You Need to Know About COVID-19 Vaccine Side Effects)

The same goes for COVID-19 tests, BTW. "Most commercial polymerase chain reaction (PCR) tests have multiple targets to detect the virus," according to the CDC. Meaning, even if a mutation in the virus impacts one of those targets, "the other PCR targets will still work" to detect COVID-19 in an infected person, reports the agency. (ICYMI: Everything You Need to Know About Coronavirus Testing)

How concerned should you be about the new COVID-19 strain?

The good news is that right now, you can trust the vaccines to be effective in protecting against COVID-19 infection, regardless of the strain. "We don't know that [the new COVID-19 strain is] more dangerous, and very importantly, we haven't seen a single mutation yet that would make [the virus] evade the vaccine," Dr. Giroir told ABC News. "[We] can't say that won't happen in the future, but right now, it looks like the vaccines should cover everything we see." Plus, researchers are continuing to investigate all variants of the virus to determine whether any of them will turn out to be associated with more severe illness or decreased vaccine efficacy, according to the WHO.

Still, with initial analyses suggesting that this new COVID-19 strain may spread more easily than other mutations, experts are urging caution now more than ever, particularly with the upcoming holidays. In other words, social distancing, wearing a mask, and washing your hands are still your best bet for avoiding COVID-19 infection and transmission (and getting vaccinated when the COVID-19 vaccine is available to you).

"Mutation or not, we know that this virus is highly contagious and that it can kill," says Dr. Amler. "At this point, everyone knows someone who has caught it and gotten terribly sick or even died. The whole key here is to block exposure. If there is no exposure, there is no infection. It's as simple as that."

The information in this story is accurate as of press time. As updates about coronavirus COVID-19 continue to evolve, it’s possible that some information and recommendations in this story have changed since initial publication. We encourage you to check in regularly with resources such as the CDC, the WHO, and your local public health department for the most up-to-date data and recommendations.

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