Rob Stein

Updated June 22, 2021 at 4:25 PM ET

The dangerous Delta variant of the coronavirus is spreading so quickly in the United States that it's likely the mutant strain will become predominant in the nation within weeks, according to federal health officials and a new analysis.

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The U.S. is banning the importation of dogs from more than 100 countries for at least a year because of a sharp increase in the number of puppies imported into the country with fraudulent rabies vaccination certificates.

"We're doing this to make sure that we protect the health and safety of dogs that are imported into the United States, as well as protect the public's health," Dr. Emily Pieracci of the Centers for Disease Control and Prevention tells NPR.

As the pandemic calms in the U.S., a growing number of states have started scaling back how often they update their dashboards tracking what's happening with the virus.

The moves are sparking alarm among many public health experts.

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