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Breakthrough COVID-19 infections are still quite rare, but scientists are now learning more about the risks posed by the delta variant to people who are vaccinated.

Here are questions to ask yourself — and databases to check — before making the decision to take off as the highly contagious coronavirus variant continues spreading.

Delta pilots are looking for higher pay and better insurance as contract negotiations continue with the company.

On the flight from Austin, Texas, to Detroit, the airline is using a plane with bigger windows to make it easier to see the eclipse.

As summer festivals and massive concerts returned this month amid the promise of "hot vax summer," the surge in the delta variant has disrupted plans for carefree live music.

COVID-19 cases are rising in parts of Pennsylvania. NPR's Steve Inskeep talks to Dr. Jeffrey Jahre, an infectious disease expert with St. Luke's University Health Network, based in Bethlehem, Pa.

The rate of new cases of COVID-19 among babies and children under 4 years old in the U.S. recently surpassed the rate of new cases among adults older than 65. Here's how to protect newborns.

Emergency units treated students and staff members after a Delta Airlines plane dumped fuel on its way to a safe emergency landing, fire and aviation authorities said.

A look at how the delta variant and vaccine efforts are shaping the course of the coronavirus through three places - Brazil, South Africa and Israel and the Palestinian territories.

A New York production's Caesar has blond hair, a fondness for long ties and a wife who speaks with a Slavic accent. Delta said the assassination tale "crossed the line on the standards of good taste."