A new coronavirus variant is on the rise. Here's why experts are concerned
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CNNUpdated 1:46 PM ET
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Madeline Holcombe
Holly Yan
Sarah Dean
Lauren Mascarenhas
Aya Elamroussi
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Summary
The Delta variant is on its way to becoming the dominant strain of coronavirus in the US, raising concerns that outbreaks could hit unvaccinated people this fall.
As said here by Madeline Holcombe and Holly Yan, CNN