WHO Advisers Warn Against Extending Dose Intervals: Virus Update

The U.S. Food and Drug Administration urged that vaccines be given according to how they were authorized, in a rebuke to officials attempting to alter the timing and dosage of shots. Experts advising the World Health Organization recommended against extending the interval between two doses, a plan under consideration in the U.K.

The European Union is negotiating with Pfizer Inc. and BioNTech SE on a deal that could double its supply of the companies’ vaccine, people familiar with the talks said, as leaders across the region face questions over the pace of Covid-19 immunizations.