America was hit by COVID-19 from two continents, studies suggest
Most Americans with coronavirus have been infected with a strain that came from Europe – but the US has been affected from both sides, with the tension shutting off Wuhan, China, which spreads on the west coast, recent research shows.
Coronavirus likely came from Europe to the United States first and circulated unseen among New Yorkers for weeks before the state’s first case was diagnosed, and even before it arrived in Washington state, where the first US case was confirmed.
It is this European strain that has caused the most infections in the US, now concentrated in New York and the East Coast, and not the strain of the virus most common in China, according to a new analysis of viral genomes by the Icahn School of Medicine at Mount Sinai.
A second species hit the west coast and probably arrived from China later, despite the fact that a man traveling from China to the U.S. was the first identified American infected with COVID-19.
Separately, the scientists at Cambridge University discovered that there are three different virus strains responsible for most of the world. It is now quite clear that coronavirus first made the leap to humans of anteater-like animals called pangolins after it started in bats.
DNA researchers believe the virus spread through the city in mid-February – weeks before the first confirmed case in New York. Based on a previous genome study, this map shows eight different types of coronavirus identified by scientists and how they have spread around the world
Travel data shows that 3.4 million travelers from countries most affected by the coronavirus outbreak entered the US when the pandemic started
The authors of the Cambridge study named the first strain to hit type A in humans. ‘
But the original didn’t last long in China, instead it stuck in Japan, Australia and the US.
Instead, a mutated version of the virus – type B – emerged and became the dominant distribution in China before moving on to Europe, South America and Canada.
A third strain, type C, became the dominant version of COVID-19 in Singapore, Italy and Hong Kong, according to the Cambridge analysis of viral samples taken from coronavirus patients.
Viruses with similar structures are grouped in families, but each specific virus often develops strains – such as family tree offshoots.
These strains arise in the hasty struggle of the virus to copy itself.
Viruses are primitive compared to our cells. They are considered to be slightly more than packages of genetic material, but less than a living organism.
Dr. Peter Forster and his team found that the UK was primarily bombarded with type B cases, with three quarters of the samples tested as that strain. Switzerland, Germany, France, Belgium and the Netherlands were also dominated by type B.
The genetic history of the coronavirus was mapped from December 24 to March 4, revealing three different but closely related variants. Scientists believe that the virus constantly mutates to overcome different levels of immune system resistance in different populations
While human, animal and plant cells have complex machines that generate energy, viral particles have to hijack these cells, forcing their machines to produce copies of the genetic material of the virus.
This ad hoc process leads to mutations, and those that are beneficial to the virus’s survival multiply in each host and spread, better at outsmarting the immune system than their predecessors.
Researchers at the Icahn School of Medicine found a slightly different pattern in the virus’s travels.
While the Cambridge scientist traced the virus from China to the US, the Icahn team unambiguously discovered that the majority of people in New York – where more than 150,000 people are infected and responsible for most cases in the US – are a tribe that comes from Europe.
Dr. Harm van Bakel, geneticist and coauthor of the Icahn School study, told it New York Times: “The majority is clearly European.”
Most of the more than 87,000 people in New York City infected with coronavirus have a species that came to the US from Europe. Pictured: NYC medical workers adapt to PPE in a field hospital set up by Mt Sinai Health System
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Last week, travel data emerged with 3.4 million travelers from countries that would end when the worst hit by the outbreak entered the US when the pandemic started.
Figures from the U.S. Department of Commerce in December, January, and February, which were the critical early months of the outbreak, show how hundreds of thousands or even millions of undetected coronavirus cases could have entered the country, while medical experts are unaware the severity of the disease.
The world first heard about the virus in December, when it was confined to China and especially the epicenter of Wuhan.
Beijing has been accused of covering up the spread of the virus, which may have left China’s borders through asymptomatic patients, well before new cases are picked up around the world.
Isolated cases began to emerge in Europe in late January, before the pandemic broke out in Europe in February.
The travel data shows that 759,493 people entered the US from China before President Trump’s travel ban on January 31.
Another 343,402 came from Italy, 418,848 from Spain and about 1.9 million more came from Great Britain.
Medical experts say it is not known how many travelers may have been infected, but it is very likely that some did not show any symptoms.
And as air travel has skyrocketed in recent years, allowing the pandemic to spread as it does now, some officials suspect the actual impact of the virus happened earlier than they realized.
Trump has been criticized for not rolling out a widespread testing program when business in the United States began to increase.
At least eight strains of virus are being tracked by researchers around the world, using genetic detection to show how the virus spreads.
Depicted, a breakdown of the different genomes of the coronavirus and which of the three major groups they belong to. The lines indicate a rough split between the type. The larger the circle, the greater the number of cases
Methods used to trace the prehistoric migration of old people were adapted to track the spread of the SARS-CoV-2 virus, which causes COVID-19
The virus seems to mutate very slowly, with only minor differences between the different strains, and none of the strains of the virus are more deadly than the others, experts say.
They also added that it doesn’t seem like the tribes will become more deadly as they evolve.
Scientists also said that despite conspiracy theories falsely claiming the virus was made in a lab, the virus’s genome shows it started in bats.
Coronavirus has now struck
They analyzed the genomes of the virus found in coronavirus patients in the United States.
It spread among the West Coasters of travelers returning from the East – but was hit hardest by a virus strain imported from Europe, a new genome analysis shows.
A second study from Cambridge University found that there are three different variants of COVID-19 that flood the world.
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