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How Are Experts Tracking Variants of the Coronavirus?

World News Desk

How Are Experts Tracking Variants of the Coronavirus?

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Scientists are scanning virus samples taken from infected people to look for mutations, through a process called genome sequencing. It is the same method researchers have been using for years to study bacteria, plants, animals and humans.

Around the world, researchers have sequenced more than 500,000 genomes of the COVID-19 virus to date.

Viruses can mutate as they make copies of themselves after infecting a person. By sequencing virus samples over time, scientists can look for recurring changes in the genome.

“If we don’t know these things, we’re running blind,” said Sara Vetter, assistant lab director for the Minnesota Department of Health.

Most mutations are meaningless, but others can make a virus more contagious, deadly or resistant to vaccines and treatment. Health experts are primarily concerned about three variants first detected in the United Kingdom, South Africa and Brazil. They seem to spread more easily and research is underway to see if they cause more serious diseases.

Evidence suggests that current vaccines still work against the variants though perhaps not as well against a mutated version that first appeared in South Africa.

Countries vary in their genomic surveillance. Britain, for example, sequences about 10 percent of specimens positive for the coronavirus, compared to less than 1 percent in the U.S.

 
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