The declaration by Ayatollah Ali Khamenei appeared to put to rest any speculation that Iran would boycott or quit the Vienna talks aimed at saving the nuclear deal.

The risk of exposure on a flight is lowered by 23 to 57 percent if middle seats are kept unoccupied, according to the study. But it did not look at what protection mask-wearing could provide.

After an early focus on AstraZeneca and months of turmoil, the European Union is pivoting away from the company’s vaccine. It has reached agreement for a faster rollout of the Pfizer-BioNTech shot.

Allies to follow U.S. out of Afghanistan.

Most tests should be able to detect the variants of concern, but test developers and health officials must remain vigilant, scientists say.

This year’s rumpus involves a scientist who opposes the occupation of the West Bank.

Low-paid workers are starting to flee the cities en masse, just like a year ago. But their hometowns, often in far-flung places, may once again be ill prepared to test arrivals and treat the sick.

Over 50 years after Brian Robson mailed himself out of Australia, emerging almost 8,000 miles away, he is looking for two friends who assisted.

The country hasn’t used it since last month, after concerns arose about a possible rare, dangerous side effect. Officials say they have adequate supplies of other vaccines to use instead.

Developers knocked down the Carlton Tavern six years ago to make way for luxury apartments. After a legal fight, they were ordered to rebuild it, brick by brick.