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Covid-19: Can new variants of the coronavirus keep emerging?

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WASHINGTON : With more than half the world still not vaccinated, the virus will likely keep finding people to infect and replicating inside them for several months or years to come.

And each time a virus makes a copy of itself, a small mutation could occur. Those changes could help the virus survive, becoming new variants.

But that doesn’t mean the virus will keep evolving in the same way since it emerged in late 2019. When a virus infects a new species, it needs to adapt to the new host to spread more widely, says Andrew Read, a virus expert at Pennsylvania State University.

According to the Centers for Disease Control and Prevention, the delta variant is twice as contagious as earlier versions of the virus.

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