It's called the XFG variant, but it's better known as "Stratus."

That's the name of the latest COVID-19 strain going around.

Variant XFG, colloquially known as "Stratus," was first detected in Southeast Asia in January but accounted for less than about 0% of cases in the United States until May. By late June, it was estimated to account for up to 14%, according to the Centers for Disease Control and Prevention.

The World Health Organization added XFG to its watchlist but evaluated the additional public health risk posed by the variant as "low" at the global level in a late June report , in which it also advised that currently approved COVID-19 vaccines are "expected to remain effective to this variant against symptomatic and severe disease."

Here's what to know about the St

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